All Publications

Publications

Hidenori Takagi

Growth of Superconducting Ba(Pb,Bi)O₃ Crystals
A. Katsui, Y. Hidaka, and H. Takagi,
Journal of Crystal Growth 66(1), 228-230 (1984).
Optical Study of the Metal-Semiconductor Transition In BaPb_1-XBi_xO₃S. Tajima, S. Uchida, A. Masaki, H. Takagi, K. Kitazawa, S. Tanaka, and A .Katsui
Physical Review B 32, 6302-6311 (1985).
High-Tc Superconductivity in Tm-Ba-Cu-O System
S. Kanbe, T. Hasegawa, M. Soki, T. Nakamura, K. Kishio, K. Kitazawa, H. Takagi, S. Uchida, K. Fueki, and S. Tanaka
Japanese Journal of Applied Physics 26, L613-L614 (1987).
Electronic States of BaPb_1-xBi_xO₃ in the Semiconducting Phase Investigated by Optical Measurements
S. Tajima, S. Uchida, A. Masaki, H. Takagi, K. Kitazawa, and S. Tanaka
Physical Review B 35, 696-703 (1987).
Infrared Spectroscopy in High T_c Superconductors (La_1-xSr_x)₂CuO₄S. Sugai, S. Uchida, H. Takagi, K. Kitazawa, and S. Tanaka
Japanese Journal of Applied Physics 26, L879-L881 (1987).
High-Tc Superconductivity of La-Ba-Cu Oxides
S. Uchida, H. Takagi, K. Kitazawa, and S. Tanaka
Japanese Journal of Applied Physics Part 2-Letters 26, L1-L2 (1987).
Specific Heat and Superconductivity in (La1-xCax)₂CuO₄
K. Kitazawa, M. Sakai, S. Uchida, H. Takagi, K. Kishio, S. Kanbe, S. Tanaka, and K. Fueki,
Japanese Journal of Applied Physics 26, L342-L344 (1987).
Specific Heat and Superconductivity of (La_0.925Sr_0.075)₂CuO₄K. Kitazawa, T. Atake, M. Sakai, H. Takagi, S. Uchida, K. Kishio, T. Hasegawa, K. Fueki, Y. Saito, and S. Tanaka
Japanese Journal of Applied Physics 26, L751-L753 (1987).
Specific Heat and Superconductivity of Ba₂YCu₃O_yK. Kitazawa, T. Atake, H. Ishii, H. Sato, H. Takagi, S. Uchida, Y. Saito, K. Fueki, and S. Tanaka, Japanese Journal of Applied Physics 26, L748-L750 (1987).
Superconductivity at 95 K in the New Yb-Ba-Cu Oxide System
K. Kitazawa, K. Kishio, H. Takagi, T. Hasegawa, S. Kanbe, S. Uchida, S. Tanaka, and K. Fueki
Japanese Journal of Applied Physics 26, L339-L341 (1987).
High-T_c Superconductivity of La-Ba-Cu Oxides. III - Electrical Resistivity Measurement
H. Takagi, S. Uchida, K. Kitazawa, and S. Tanaka,
Japanese Journal of Applied Physics 26, L151-L152 (1987).
High T_c Superconductivity of La-Ba-Cu Oxides. II---Specification of the Superconducting Phase
H. Takagi, S. Uchida, K. Kitazawa, and S. Tanaka
Japanese Journal of Applied Physics, Part 2-Letters 26, L123-L124 (1987).
New High-Temperature Superconducting Oxide. (La_1-xSr_x)₂CuO₄ and (La_1-xCa_x)₂CuO₄K. Kishio, K. Kitazawa, S. Kanbe, I. Yasuda, N. Sugii, H. Takagi, S. Uchida, K. Fueki, and S. Tanaka
Chemistry Letters 2, 429-432 (1987).
The Influence of Oxygen Deficiency on the Electrical Resistivity of High-T_c Superconducting Oxides (La,Ba)₂CuO₄H. Takagi, S. Uchida, K. Kitazawa, and S. Tanaka
Japanese Journal of Applied Physics 26, L218-L219 (1987).
High-T_c Superconductivity of La-Ba(Sr)-Cu Oxides. IV - Critical Magnetic Fields
S. Uchida, H. Takagi, S. Tanaka, K. Nakao, N. Miura, K. Kishio, K. Kitazawa, and S. Tanaka
Japanese Journal of Applied Physics 26, L196-L197 (1987).
Superconductivity and Lattice Parameters in (La_1-xSr_x)₂CuO₄ Solid Solution System
S. Kanbe, K. Kishio, K. Kitazawa, K. Fueki, H. Takagi, and S. Tanaka
Chemistry Letters 3, 547-550 (1987).
Electric and Magnetic Properties of La₂CuO₄S. Uchida, H. Takagi, K. Kishio, K. Kitazawa, K. Fueki, and S. Tanaka
Japanese Journal of Applied Physics 26, L445-L446 (1987).
Superconducting Properties of (La_1-xSr_x)₂CuO₄S. Uchida, H. Takagi, K. Kishio, K. Kitazawa, K. Fueki, and S. Tanaka
Japanese Journal of Applied Physics 26, L443-L444 (1987).
Transport Properties of (La_1-xA_x)₂CuO₄S. Uchida, H. Takagi, H. Ishii, H. Eisaki, T. Yabe, S. Tajima, and S. Tanaka
Japanese Journal of Applied Physics 26, L440-L442 (1987).
Magnetic Susceptibility of High-T_c Superconducting Oxides (La, A)₂CuO₄ (A=Ba, Sr)
H. Takagi, S. Uchida, H. Obara, K. Kishio, K. Kitazawa, K. Fueki, and S. Tanaka
Japanese Journal of Applied Physics Part 2-Letters 26, L434-L436 (1987).
High Field Measurement of the Critical Field in (La_1-xSr_x)₂CuO₄ up to 40 T
K. Nakao, N. Miura, S. Uchida, H. Takagi, S. Tanaka, K. Kishio, J. Shimoyama, K. Kitazawa, and K. Fueki
Japanese Journal of Applied Physics Part 2-Letters 26, L413-L414 (1987).
High-T_c Superconductivity and Diamagnetism of Y-Ba-Cu Oxides
H. Takagi, S. Uchida, K. Kishio, K. Kitazawa, S. Tanaka, and K. Fueki
Japanese Journal of Applied Physics 26, L320-L321 (1987).
High-Tc Superconducting Oxide Solid-Solutions (La_1-X(Ba,Sr,Ca)_X)₂Cuo_4-δK. Kishio, K. Kitazawa, N. Sugii, S. Kanbe, K. Fueki, H. Takagi, S. Tanaka
Chemistry Letters, 635-638 (1987).
Bulk Superconductivity of Y-Ba-Cu-O and Er-Ba-Cu-O
H. Takagi, S. Uchida, H. Sato, H. Ishii, K. Kishio, K. Kitazawa, K. Fueki, and S. Tanaka
Japanese Journal of Applied Physics 26, L601-L602 (1987).
Chemical Aspects of the High-Tc Superconducting Solids
K. Fueki, K. Kitazama, K. Kishio, S. Uchida, H. Takagi, and S. Tanaka
Abstracts of Papers of the American Chemical Society 194, 11-(1987).
Chemical Aspect of High-temperature Superconducting Oxides
K. Fueki, K. Kitazawa, K. Kishio, T. Hasegawa, S. Uchida, H. Takagi, and S. Tanaka
ACS Symposium Series 351, Chemistry of High-Temperature Superconductors, Eds.: D. L. Nelson, M. Stanley Whittingham, and T. F. George. American Chemical Society 351, 38-48 (1987).
Investigation of Electron and Phonon States of the High-T_c Cu Oxide Superconductivity
S. Tajima, A. Masaki, I. Rittaporn, H. Satot, H. Ishii, H. Takagi, S. Uchida, and S. Tanaka
Physica B 148, 423-425 (1987).
Transport Properties of High-T_c Superconducting Oxides
H. Ishii, H. Sato, N. Kanazawa, H. Takagi, S. Uchida, K. Kitazawa, K. Kishio, K. Fueki, and S. Tanaka
Physica B & C 148, 419-422 (1987).
Oxygen Stoichiometry and Physical Properties of High-T_cSuperconducting Oxides
H. Takagi, S. Uchida, H. Iwabuch, H. Eisaki, K. Kishio, K. Kitazawa, K. Fueki, and S. Tanaka
Physica B & C 148, 349-352 (1987).
Optical Studies of High-T_c Oxide Superconductors
S. Sugai, S. Uchida, H. Takagi, K. Kitazawa, S. Tanaka, M. Sato, S. Hosoya
Physica B & C 148, 282-284 (1987).
Study of the Upper Critical Field H_c2 for High-T_c Superconductors in Pulsed High Magnetic Fields
K. Nakao, N. Miura, S. Uchida, H. Takagi, S. Tanaka, K. Kishio, J. Shimoyama, K. Kitazawa, and K. Fueki
Japanese Journal of Applied Physics 26, 1187-1188 (1987).
Electronic Properties of High-T_c Superconducting Oxides
S. Uchida, S. Tajima, H. Takagi, K. Kishio, K. Kitazawa, K. Fueki, and S. Tanaka
Japanese Journal of Applied Physics 26, 1105-1106 (1987).
Superconductivity in Ba₂LnCu₃O_y(Ln = Y, Lanthanides)
H. Takagi, S. Uchida, K. Kishio, K. Kitazawa, K. Fueki, and S.Tanaka
Japanese Journal of Applied Physics 26, 1029-1030 (1987).
Raman and Infrared Studies of Oxide Superconductors (La_1-xM_x)₂CuO₄S. Sugai, M. Sato, S. Hosoya, S. Uchida, H. Takagi, K. Kitazawa, and S. Tanaka
Japanese Journal of Applied Physics Part 1 - Regular Papers Short Notes & Review Papers 26-3, 1003-1004 (1987).
Transport and Optical Studies of Single Crustals of the 80 K Bi-Sr-Ca-Cu-O Superconductor
H. Takagi, H. Eisaki, S. Uchida, A. Maeda, S. Tajima, K. Uchinokura, and S. Tanaka
Nature 332, 236-238 (1988).
Superconductivity in YBa₂Cu₃O_7-yin a 100 tesla Magnetic Field
K. Nakao, N. Miura, K. Tatsuhara, S. Uchida, H. Takagi, T. Wada, and S. Tanaka
Nature 332, 816-818 (1988).
Magnetic Phase-Diagram And Superconductivity In High-T_c YBa₂Cu₃O_7-yY. Kitaoka, S. Hiramatsu, K .Ishida, K. Asayama, H. Takagi, H. Iwabuchi, S. Uchida, and S. Tanaka
Journal of The Physical Society of Japan 57, 737-740 (1988).
The effect of lanthanide substitution on the superconductivity in Ba₂YCu₃O₇and (La,Sr)₂CuO₄H. Takagi, S. Uchida, H. Eisaki, S. Tanaka, K. Kishio, K. Kitazawa, and K. Fueki
Journal of Applied Physics 63, 4009-4014 (1988).
Optical Properties of High-T_c Copper Oxides
H. Ishii, I. Rittaporn, H. Takagi, S. Tajima, S. Uchida, S. Tanaka, M. Suzuki, T. Murakami, M. Seki, and S. Suga
Physica C 153-155, 655-656 (1988).
Nuclear Relaxation and Knight Shift Studies of ⁶³Cu in 90 K- and 60 K-Class YBa₂Cu₃O_7-yY. Kitaoka, S. Hiramatsu, Y. Kohori, K. Ishida, T. Kondo, H. Shibai, K. Asayama, H. Takagi, S. Uchida, H. Wabuchi, and S. Tanaka
Physica C 153-155, 83-86 (1988).
Electronic-Properties of Cuprate Superconductors
K. Kitazawa, H. Takagi, K. Kishio, T. Hasegawa, S. Uchida, S. Tajima, S .Tanaka, and K. Fueki
Physica C 153, 9-14 (1988).
Raman Scattering in Bi-Sr-Ca-Cu-O Single Crystals
S. Sugai, H. Takagi, S. Uchida, and S. Tanaka
Japanese Journal of Applied Physics 27, L1290-L1292 (1988).
Magnetization and Critical Current Density of High-Tc Superconductors ABa₂Cu₃O_7-x (A=Y, Eu, Gd, Dy, Er) in Pulsed High Magnetic Fields
K. Nakao, K. Tatsuhara, N. Miura, S. Uchida, H. Takagi, T. Wada, and S. Tanaka
Journal of The Physical Society of Japan 57, 2476-2481 (1988).
Photoemission From Single-Crystalline Bi-Sr-Ca-Cu-O
S. Kohiki, T. Wada, S. Kawashima, H. Takagi, S. Uchida, and S. Tanaka
Physical Review B 38, 7051-7053 (1988).
Observation of Cu-NMR of CuO₂ Plane Site in Antiferromagnetic YBa₂Cu₃O_6.1Y. Yamada, K. Ishida, Y. Kitaoka, K. Asayama, H. Takagi, H. Iwabuchi, and S. Uchida
Journal of the Physical Society of Japan 57, 2663-2665 (1988).
Structure and Bonding of Bi-Sr-Ca-Cu-O Crystal by X-ray Photoelectron Spectroscopy
S. Kohiki, T. Wada, S. Kawashima, H. Takagi, S. Uchida, and S. Tanaka
Physical Review B 38, 8868-8872 (1988).
AC-DC Conversion Effect in Ceramic Superconductor BaPb_1-xBi_xO₃S. Ikegawa, T. Honda, H. Ikeda, A. Maeda, H. Takagi, S. Uchida, K. Uchinokura, and S. Tanaka
Journal of Applied Physics 64, 5061-5066 (1988).
Oxygen Content Dependence of Nuclear Resonance Spectrum in Tetragonal YBa₂Cu₃O_xM. Matsumura, H. Yamagata, K. Ishida, Y. Kitaoka, K. Asayama, H. Takagi, H. Iwabuchi, and S. Uchida
Journal of the Physical Society of Japan 57, 3297-3300 (1988).
Phase Diagram of Magnetic Order and Superconductivity in High-T_c YBa₂Cu₃O_xY. Kitaoka, K. Ishida, K. Asayama, H. Takagi, H. Iwabuchi, and S. Uchida
Journal de Physique 49, Suppl C8, 2157-2158 (1988).
μ-SR Studies of High-Tc Superconductivity
Y. J. Uemura, B. J. Sternlieb, D. E. Cox, V. J. Emery, A. Moodenbaugh, M .Suenaga, J. H. Brewer, J. F. Carolan, W. Hardy, R. Kadono, J. R. Kempton, R. F. Kieff, S. R. Kreitzman, G. M. Luke, P .Mulhern, T. Riseman, D. L. Williams, B. X. Yang, W. J. Kossler, X. H. Yu, H. Schone, C. E. Stronach, J. Gopala-krishnan, M. A. Subramanian, A. W. Sleight, H .Hart, K. W. Lay, H. Takagi, S. Uchida, Y .Hidaka, T. Murakami, S. Etemad, P .Barboux, D. Keane, V .Lee, and D. C. Johnston
Journal de Physique 49, Suppl C8, 2087-2092 (1988).
A Superconducting Copper Oxide Compound with Electrons as Charge Carriers
Y. Tokura, H. Takagi, and S. Uchida
Nature 337, 345-347 (1989).
Electron Tunneling Measurements of High-T_c Superconductor Bi-Sr-Ca-Cu-O by STM
T. Hasegawa, H. Suzuki, S. Yaegashi, H. Takagi, K. Kishio, S. Uchida, K. Kitazawa, and K. Fueki
Japanese Journal of Applied Physics 28, L179-L182 (1989).
Studies of Static Magnetic Order in Electron-Superconductors and their Parent Compounds
G. M. Luke, B. J. Sternlieb, Y. J. Uemura, J. H. Brewer, R, Kadono, R. F. Kiefl, S. R. Kreitzman, T. M. Riseman, J. Gopalakrishnan, A. W. Sleight, M. A. Subramanian, S. Uchida, H. Takagi, and Y. Tokura
Nature 338, 49-51 (1989).
Superconductivity Produced by Electron-Doping in CuO₂-Layered Compounds
H. Takagi, Y. Tokura, and S. Uchida
Physical Review Letters 62, 1197-1200 (1989).
Optical Study on the Metal-Insulator Transition on Ba_1-xK_xBiO₃ Thin Films
H. Sato, S. Tajima, H. Takagi, and S. Uchida
Nature 338, 241-243 (1989).
Observation of Secondary Magnetic Transition in Tetragonal YBa₂Cu₃O_xM. Matsumura, H. Yamagata, Y. Yamada, K. Ishida, Y. Kitaoka, K. Asayamma, H. Takagi, H. Iwabuchi, and S. Uchida
Journal of the Physical Society of Japan 58, 805-808 (1989).
Universal Correlations between T_c and n_s/m* (Carrier Density Over Effective Mass) in High-T_c Cuprate Superconductors
Y. J. Uemura, G. M. Luke, B. J. Sternlieb, J. H. Brewer, J. F. Carolan, W. N. Hardy, R. Kadono, J. R. Kermpton, R. F. Kiefl, S. R. Kreitzman, P. Mulhern, T. M. Riseman, D. Ll. Williams, B. X. Yang, S. Uchida, H. Takagi, J. Gopalakrishnan, A. W. Sleight, M. A. Subramanian, C. L. Chien, M. Z. Ciepiak, Gang Xiao, V. Y. Lee, B.W. Statt, C. E. Stronach, W. J. Kossler, and X. H. Yu
Physical Review Letters 62, 2317-2320 (1989).
Electron and Hole-Doping in Nd-Based Cuprates with Single-Layer CuO₂ Sheets
Y. Tokura, A. Fujimori, H. Matsubara, H. Watabe, H. Takagi, S. Uchida, M. Sakai, H. Ikeda, S. Okuda, and S. Tanaka
Physical Review B 39, 9704-9707 (1989).
Anomalous Absence of Pressure Effect on Transition Temperature in Electron-Doped Superconductor Nd_1.85Ce_0.15CuO_4-δC. Murayama, N. Mori, S. Yomo, H. Takagi, S. Uchida, and Y. Tokura
Nature 339, 293-294 (1989).
Magnetic Measurements of High-Tc Superconductors In Megagauss Fields
K. Nakao, N. Miura, K. Tatsuhara, S. Uchida, H. Takagi, T. Wada, S. Tanaka, H. Takeya, and F Takei
Physica B 155, 156-159 (1989).
Neutron and Electron Diffraction Study of the Electron-Doped Superconductor Nd_1.85Ce_0.15CuO_4-δF. Izumi, Y. Matsui, H. Takagi, S. Uchida, Y. Tokura, and H. Asano
Physica C 158, 433-439 (1989).
Ultraviolet Photoemission Study of Single-crystal BaPb_1-xBi_xO₃H. Matsuyama, T. Takahashi, H. Katayama-Yoshida, Y. Okabe, H. Takagi, and S. Uchida
Physical Review B 40, 2658-2661 (1989).
New Family of Layered Copper Oxide Compounds with Orderd Cations: Prospective High-Temperature Superconductors
Y. Tokura, H. Takagi, H. Watabe, H. Matsubara, S. Uchida, K. Hiraga, T. Oku, T. Mochiku, and H. Asano
Physical Review B 40, 2568-2571 (1989).
Superconductor to Nonsuperconductor Transition in (La_1-xSr_x)₂CuO₄ as Investigated by Transport and Magnetic Measurements
H. Takagi, T. Ido, S. Ishibashi, M. Uota, S. Uchida, and Y. Tokura
Physical Review B 40, 2254-2261 (1989).
Origin of the Electronic States near Fermi Level in High-T_c Superconductors
A. Fujimori, Y. Tokura, H. Eisaki, H. Takagi, S. Uchida, and M. Sato
Physical Review B 40, 7303-7306 (1989).
New Double-Sheet Copper-Oxide Compounds with BiO or TlO layers
Y. Tokura, T. Arima, H. Takagi, S. Uchida, R. Beyers, A. I. Nazzal, J. B. Torrance
Nature 342, 890-893 (1989).
Doping Effect on the Transport and Optical Properties of p-Type and n-Type Cuprate Superconductors
S. Uchida, H. Takagi, and Y. Tokura
Physica C 162, 1677-1680 (1989).
Photoemittion Study of Single Crystal BaPb_1-xBi_xO₃H. Matsuyama, T. Takahashi, H. Katayama-Yoshida, H. Takagi, and S. Uchida
Physica C 162, 1319-1320 (1989).
Optical-Excitations In CuO₂-Sheets Doped and Undoped with Electrons
Y. Tokura, H. Takagi, T. Arima, S. Koshihara, T. Ido, S. Ishibashi, and S. Uchida
Physica C 162, 1231-1232 (1989).
Optical and Transport Studies of Metal-Insulator Transition on (Ba, K) BiO₃ Thin Films
H. Sato, S. Tajima, H. Takagi, and S. Uchida
Physica C 162-164, 1121-1122 (1989).
Similarity and Dissimilarity in Transport Properties of Electron- and Hole-Doped High-T_c Cuprate
H. Takagi, Y. Tokura, and S. Uchida
Physica C 162, 1001-1002 (1989).
Muon-Spin-Rotation Study of Magnetism in La_0.85Sr_0.15CuO₄ and YBa₂Cu₃O_x below 90 mK
R. F. Kiefl, J. H. Brewer, J. Carolan, P. Dosanjh, W. N. Hardy, R. Kadono, J. R. Kempton, R. Krahn, P. Schleger, B. X. Yang, Hu Zhou, G. M. Juke, B. Sternlieb, Y. J. Uemura,W. J. Kossler, X. H. Yu, E. J. Ansaldo, H. Takagi, S. Uchida, and C. L. Seaman
Physical Review Letters 63, 2136-2139 (1989).
μ-SR study of magnetism in La_1.85Sr_0.15CuO₄ and YBa₂Cu₃O_xbelow 90 mk
R. F. Kiefl, E. J. Ansaldo, J. H. Brewer, J. F. Carolan, P. Dosanjh, W. N. Hardy, R. Kadono, J. R. Kempton, W. J. Kossler, R. Krahn, S. R. Kreitzman, G. M. Luke, P. Schleger, C. L. Seaman, B. Sternlieb, H. Takagi, S. Uchida, Y. J. Uemura, B. X. Yang, X. H. Yu, and H. Zhou
Physica C 162, 161-162 (1989).
Static Magnetic Order in Electron-Superconductor Related Compounds
G. M. Luke, L. P. Le, B. J. Sternlieb, Y. J. Uemura, J. H. Brewer, R. Kadono, R. F. Kiefl, S. R. Kreitzman, T. M. Riseman, M. B. Maple, C. L. Seaman, K. Kakurai, S. Uchida, H. Takagi, Y. Tokura, Y. Hidaka, T. Murakami, J. Gopalakrishman, A. W. Sleight, and M. A. Subramanian
Physica C 162-164, 825-826 (1989).
Optical Reflectivity Spectra of Single-Crystal Bi₂Sr₂Ca_n-1Cu_nO_2n+4+x (n=1 and 2)
I. Terasaki, S. Tajima, H. Eisaki, H. Takagi, K. Uchinokura, and S. Uchida
Physical Review B 41, 865-868 (1990).
Cu K-edge X-ray Absorption Near-edge Structure and Electronic Structure of Nd_2-xCe_xCuO_4-y and La_2-xSr_xCuO₄N. Kosugi, Y. Tokura, H. Takagi, and S. Uchida
Physical Review B 41, 131-137 (1990).
Antiferromagnetic Nuclear Resonance of Cu in Nd₂CuO₄Y. Yoshinari, H. Yasuoka, T. Shimizu, H. Takagi, Y. Tokura, and S. Uchida
Journal of the Physical Society of Japan 59, 36-39 (1990).
The Effect of High-Energy Electron-Beam Bombardment on Single-Crystal Bi₂Sr₂CuO₆ Surfaces
A. E. Bocquet, S .Ogawa, S. Suga, H. Eisaki, H. Takagi, and S. Uchida
Japanese Journal of Applied Physics 29, L511-L514 (1990).
Resonant-photoemission Study of Nd_2-xCe_xCuO₄H. Namatame, A. Fujimori, Y. Tokura, M. Nakamura, K. Yamaguchi, A. Misu, H. Matsubara, S. Suga, H. Eisaki, T. Ito, H. Takagi , and S. Uchida
Physical Review B 41, 7205-7208 (1990).
Single-Crystal X-Ray Structure Analysis of New Oxide-Superconductor Bi₂(Sr_1-xLn_x)₂(Gd_1-yCe_y)₂Cu₂O_10+yI. Nakai, K. Imai, T. Arima, Y. Tokura, H. Asano, H. Takagi, S. Uchida, R. Beyers, and J. B. Torrance
Japanese Journal of Applied Physics 29, L572-L575 (1990).
Electronic Structure of Bi-based Copper Oxide Superconductors: A Comparative Photoemission Study of Bi₂Sr₂CaCu₂O₈, Bi₂Sr₂CuO₆, and Bi₂Sr₂CoO_6+δH. Eisaki, H. Takagi, S. Uchida, H. Matsubara, S. Suga, M. Nakamura, K. Yamaguchi, A. Misu, H. Nakamura, and A. Fujimori
Physical Review B 41, 7188-7191 (1990).
Bonding States in the CuO₂-Plane of the Layered Cuprates
S. Tajima, S. Ishibashi, T. Ito, H. Eisaki, H. Takagi, T. Arima, Y. Mizuo, Y. Tokura, and S. Uchida
Physica B 165, 1239-1240 (1990).
Cu-O Network Dependence of Electronic Parameters in High-T_c Superconductor-Related Compounds
Y. Tokura, S. Koshihara, T. Arima, H. Takagi, T. Ido, S. Ishibashi, and S. Uchida
Physical Review B 41, 11657-11660 (1990).
Optical Phonons in Copper Oxides with a Single CuO₂ Plane
S. Tajima, S. Uchida, S. Ishibashi, T. Ido, H. Takagi, T. Arima, and Y. Tokura
Physica C 168, 117-122 (1990).
Extended Family of New Bi-2222 Superconducting Cuprates Bi₂(Sr_1-xLn_x)₂(Gd_1-yCe_y)₂Cu₂O_10+yT. Arima, Y. Tokura, H. Takagi, S. Uchida, R. Beyers, and J. B. Torrance
Physica C 168, 79-84 (1990).
Electronic-Structure of the electron-doped superconductor Nd_2-XCe_xCuO_4-ystudied by photoemission spectroscopy
A. Fujimori, Y. Tokura, H. Eisaki, H. Takagi, S. Uchida, E. Takayama-Muromachi
Physical Review B 42, 325-328 (1990).
High-energy Spin Excitations in the Insulating Phases of High-T_c Superconducting Cuprates and La₂NiO₄S. Sugai, M. Sato, T. Kobayashi, J. Akimitsu, T. Ito, H. Takagi, S. Uchida, S. Hosoya, T. Kajitani, and T. Fukuda
Physical Review B 42, 1045-1047 (1990).
Electronic Structure of Bi₂Sr₂CaCu₂O₈ by Photoemission and Brehmsstrahlung Isochromat Spectroscopy
A. E. Bocquet, S. Ogawa, H. Eisaki, H. Takagi, S. Uchida, A. Fujimori, and S. Suga
Physica C 169, 1-6 (1990).
Gap Observation by Tunneling Measurement on Superconducting Ba_1-xK_xBiO₃ Thin Film
H. Sato, H. Takagi, and S. Uchida
Physica C 169, 391-395 (1990).
Rare Earth (RE) Dependence, and Ce-Concentration Dependence of T_c in Bi-2222 Phase Bi₂Sr₂(RE_1-xCe_x)₂Cu₂O_10+yT. Arima, Y. Tokura, H. Takagi, S. Uchida, R. Beyers, and J. B. Torrance
Physica B 165, 1551-1552 (1990).
Spins and Carriers in Oxide Superconductors Studied by Raman Scattering
S. Sugai, M. Sato, T. Ito, T. Ido, H. Takagi, S. Uchida, T. Kobayashi, J. Akimitsu, Y. Hidaka, T. Murakami, S. Hosoya, T. Kajitani, and T. Fukuda
Physica B 165, 1263-1264 (1990).
Optical Study of the Electronic State in La_2-xSr_xCuO₄S. Uchida, T. Ido, H. Takagi, T. Arima, Y. Tokura, and S. Tajima
Physica B 165-166, 1249-1250 (1990).
Photoemission Spectroscopic Study of Copper-Oxide Superconductors and Related Materials
H. Eisaki, T. Ido, H. Takagi, S. Uchida, T. Mizokawa, H. Namatame, A. Fujimori, Y. Tokura, J. van Elp, P. Kuiper, G. A. Sawatsky, S. Hosoya, H. Katayama-Yoshida, K. Oka, and H. Unoki
Physica B 165-166, 1225-1226 (1990).
Symmetry Breaking on the Phonon Raman Spectra Only at the Superconducting Compositions
S. Sugai, S. Shamoto, M. Sato, T. Ido, H. Takagi, and S. Uchida
Solid State Communicatons 76, 371-376 (1990).
Electronic Raman Scattering from the Hole-Spin Composite States in La_2-xSr_xCuO₄S. Sugai, T. Ido, H. Takagi, S. Uchida, M. Sato, and S. Shamoto
Solid State Communications 76, 365-369 (1990).
Electronic Structure of p-Type and n-Type Cuprate Superconductors
S. Uchida, H. Takagi, and Y. Tokura
Journal of Less-Common Metals 164-165, 741-748 (1990).
Magnetic Order and Electronic Phase Diagrams of Electron-doped Copper Oxide Materials
G. M. Luke, L. P. Le, B. J. Sternlieb, Y. J. Uemura, J. H. Brewer, R. Kadono, R. F. Kiefl, S. R. Kreitzman, T. M. Riseman, C. E. Stronach, M. R. Davis, S. Uchida, H. Takagi, Y. Tokura, Y. Hidaka, T. Murakami, J. Gopalakrishnan, A. W. Sleight, M. A. Subramanian, E. A. Early, J. T. Markert, M. B. Maple, and C. L. Seaman
Physical Review B 42, 7981-7988 (1990).
Sr-induced Oxygen Defects in La_2-xSr_xCuO_4-δT. Kamiyama, F. Izumi, H. Asano, H. Takagi, S. Uchida, Y. Tokura, E. Takayama-Muromachi, M. Matsuda, K. Yamada, Y. Endoh, and Y. Hidaka
Physica C 172, 120-126 (1991).
2-Spin Superexchange And 4-Spin Cyclic Exchange Interactions In High-Tc Superconducting Cuprates And Isostructural La₂NiO₄S. Sugai, M. Sato, T. Ito, T. Ido, H. Takagi, S. Uchida, T. Kobayashi, J. Akimitsu, Y. Hidaka, T. Murakami, S. Hosoya, T. Kajitani, and T. Fukuda
Journal of Magnetism and Magnetic Materials ,Jan-90, 631-632 (1990).
Correlations Between Tc And Ns/M-Star (Carrier Density Effective Mass) In High-Tc And Organic Superconductors
Y. J. Uemura, L. P. Le, G. M. Luke, B. J. Sternlieb, J. H. Brewer, J .Carolan, W. Hardy, R. Kadono, R. F. Kiefl, S. R. Kreitzman, T. M. Riseman, C. L. Seaman, J. J. Neumeier, M. B. Maple, G. Saito, H. Yamochi, H. Takagi, S. Uchida, J. Gopalakrishnan, M.A. Subramanian, A. W. Sleight, and G. Xiao
Hyperfine Interactions 63, 131-138 (1990).
µ-SR studies of Oxide-Superconductors
N. Nishida, S. Okuma, H. Miyatake, S. Siratake, Y. Hidaka, T. Murakami, Y. Ueda, K. Kosuge, S. Kambe, H. Yasuoka, H. Takagi, S.Uchida, K. Nishiyama, K. Nagamine, Y. Kuno, and T. Yamazaki
Hyperfine Interactions 65, 1027-1034 (1990).
Electronic Structure Studies on the n-type Doped Superconductors R_2-xM_xCuO_4-δ, and Nd₂CuO_4-xF_x by Electron-Energy-Loss Spectroscopy
M. Alexander, H. Romberg, N. Nucker, P. Adelmann, J. Fink, J. T. Markert, M. B. Maple, S. Uchida, H. Takagi, Y. Tokura, A. C. W. P. James, and D. W. Murphy
Physical Review B 45, 333-343 (1991).
^63,65Cu-NMR Study of Oxidized, and Reduced Nd_2-xCe_xCuO₄S. Kambe, H. Yasuoka, H. Takagi, S. Uchida, and Y. Tokura
Journal of the Physical Society of Japan 60, 400-403 (1991).
Optical Spectra of La_2-xSr_xCuO₄S. Uchida, T. Ido, H. Takagi, T. Arima, Y. Tokura, and S. Tajima
Physical Review B 43, 7942-7954 (1990).
Normal-state Conductivity between CuO₂ Planes in Copper Oxide Superconductors
T. Ito, H. Takagi, S. Ishibashi, T. Ido, and S. Uchida
Nature 350, 596-598 (1991).
Optical Phonon Study of the Single Crystals of Various Layered Cuprates, and Related Materials
S. Tajima, T. Ido, S. Ishibashi, T. Ito, H. Eisaki, Y. Mizuo, T. Arima, H. Takagi, and S. Uchida
Physical Review B 43, 10496-10507 (1991).
Pressure Effect on the Transport Properties in the Low Temperature Phase of La_1.875Ba_0.125CuO₄C. Murayama, T. Tamegai, Y. Iye, N. Mori, I. Oguro, S. Yomo, H. Takagi, and S. Uchida
Physical Review B 169, 639-640 (1991).
A New Type of Homologous Series in the La-Cu-O System
R. J. Cava, T. Siegrist, B. Hessen, J. J. Krajewski, W. F. Peck, Jr., B. Batlogg, H. Takagi, J. V. Waszczak, and L. F. Schneemeyer
Physica C 177, 115-121 (1991).
Overview of Organic Superconductor κ-(BEDT-TTF)₂[Cu(NCS)₂] and its Related Materials
G. Saito, H. Yamochi, T. Nakamura, T. Ishiguro, Y. Nogami, Y. Ito, H. Mori, K. Oshima, M. Nakashima, S. Uchida, H. Takagi, S. Kagoshima, and S. Osada
Synthetic Metals 41-43, 1993-1998 (1991).
A New Homologous Series of Lanthanum Copper Oxides
R. J. Cava, T. Siegrist, B. Hessen, J. J. Krajewski, W. F. Peck, Jr., B. Batlogg, H. Takagi, J. V. Waszczak, and L. F. Schneemeyer
Journal of Solid State Chemistry 94, 170-184 (1991).
Micro-twin and Antiphase Domain Boundaries in the Orthorhombic Phase of La_2-x(Sr, Ba)_xCuO₄C. H. Chen, D. J. Werder, S.-W. Cheong, and H. Takagi
Physica C 183, 121-129 (1991).
The Electronic Structure of BaPb_1-xBi_xO₃ Studied by Photoemission Spectroscopy
H. Namatame, A. Fujimori, H. Takagi, and S. Uchida
Physica C 185-189, 2725-2726 (1991).
Pressure Dependence of Superconducting Transition Temperature, and of Hall Constant in High-T_c Cu-Oxide Superconductors
N. Mori, C. Murayama, H. Takahashi, H. Kaneko, K. Kawabata, Y. Iye, S. Uchida, H. Takagi, Y. Tokura, Y. Kubo, H. Sasakura, and K. Yamaya
Physica C 185-189, 40-44 (1991).
Electrical Conduction Across CuO₂ Planes in Copper Oxide Superconductors
T. Ito, Y. Nakamura, H. Takagi, and S. Uchida
Physica C 185-189, 1267-1268 (1991).
Microstructural Aspects of the LTO → LTT Transition in La_1.875Ba_0.125CuO₄M. Marezio, H. Takagi, B. Batlogg, P. Bordet, D.E. Cox and S. Uchida
Physica C 185-189, 873-874 (1991).
Temperature Dependence of NMR Spectrum at Cu(2) Site in Antiferromagnetic YBa₂Cu₃O_6.1Y. Iwamoto, M. Matsumura, H. Yamagata, K. Ishida, Y. Kitaoka, K. Asayama, H. Takagi, H. Iwabuchi, and S. Uchida
Journal of the Physical Society of Japan 61, 441-444 (1992).
Superconductivity at 28 K in a Cuprate with a Niobium Oxide Intermediary Layer
R. J. Cava, J. J. Krajewski, H. Takagi, H. Zandbergen, R. B. van Dover, W. F. Peck, Jr., and B. Hessen
Physica C 191, 237-242 (1992).
Disappearance of Superconductivity in Overdoped La_2-xSr_xCuO₄ at a Structural Phase Boundary
H. Takagi, R. J. Cava, M. Marezio, B. Batlogg, J. J. Krajewski, and W. F. Peck, Jr.
Physical Review Letters 68, 3777-3780 (1992).
Metal Atom Stoichiometry in the Electron Doped Superconductor (Nd,Ce)₂CuO₄R. J. Cava, H. Takagi, M. Fleming, J. J. Krajewski, W. F. Peck, Jr., P. Bordet, M. Marezio, B. Batlogg, and L. W. Rupp
Physica C 199, 65-72(1992).
Systematic Evolution of Temperature-Dependent Resistivity in La_2-xSr_xCuO₄H. Takagi, B. Batlogg, H. L. Kao, J. Kwo, R. J. Cava, J. J. Krajewski, and W. F. Peck
Physical Review Letters 69, 2975-2978 (1992).
Systhesis and Characterization of Ba₃(Pb_1-xBi_x)₂O₇R. J. Cava, H. Takagi, H. W. Zandbergen, B. Hessen, J. J. Krajewski, and W. F. Peck, Jr.
Physical Review B 46, 14101-14104 (1992).
Microstructural Changes Induced by Lattice Instablities in La_2-xBa_xCuO₄ (x = 0.125) and Nd₂NiO₄C. H. Chen, S. Cheong, D. J. Werder, and H. Takagi
Physica C 206, 183-194 (1993).
Oxygen-Deficient Barium Lead Oxide Perovskites
R. J. Cava, H. Takagi, J. J. Krajewski, W. F. Peck, Jr., and H. Y. Hwang
Physical Review B 47, 11525-11528 (1993).
LaCuO_2.5+X and YCuO_2.5+X Delafossites - Materials With Triangular Cu^2+δ Planes
R. J. Cava, H. W. Zandbergen, A. P. Ramirez, H. Takagi, C. T. Chen, J. J. Krajewski, W. F. Peck, Jr., V. Waszczak, G .Meigs, R. S. Roth, and L. F. Schneemeyer
Journal of Solid State Chemistry 104, 437-452 (1993).
Superconductivity and the Low-Temperature Orthorhombic to Tetragonal Phase Transition in La_2-xBa_xCuO₄S. J. L. Billinge, G. H. Kwei, A. C. Lawson, J. D. Thompson, and H. Takagi
Physical Review Letters 71, 1903-1906 (1993).
Structural Aspects of The Crystallographic Magnetic Transition In LaVO₃ Around 140-K
P .Bordet, C. Chaillout, M. Marezio, Q. Huang, A .Santoro, S. W. Cheong, H. Takagi, C. S. Oglesby, and B. Batlogg
Journal of Solid State Chemistry 106, 253-270 (1993).
Systematics of Transport Anisotropy in Single-Domain La_2-xSr_xCuO₄ Films
H. L. Kao, J. Kwo, H. Takagi, and B. Batlogg
Physical Review B 48, 9925-9928 (1993).
Physical-Properties of Some Ternary Ce Intermetallics With The Transition-Metals Ni And Pd
R. J. Cava, A. P. Ramirez, H. Takagi, J. J. Krajewski, and W. F. Peck
Journal of Magnetism and Magnetic Materials 128, 124-128 (1993).
Electronic Structure and the Metal-Semiconductor Transition in BaPb_1-xBi_xO₃ Studied by Photoemission and X-ray Absorption Spectroscopy
H. Namatame, A. Fujimori, H. Takagi, S. Uchida, F. M. F. de Groot, and J. C. Fuggle
Physical Review B 48, 16917-16925 (1993).
Superconductivity at 23 K in yttrium palladium boride carbide
R. J. Cava, H. Takagi, B .Batlogg, H. W. Zandbergen, J. J. Krajewski, W. F. Peck, R. B. Vandover, R. J. Felder, T. Siegrist, K. Mizuhashi, J. O. Lee, H. Eisaki, S. A. Carter, and S. Uchida
Nature 367, 146-148 (1994).
Superconductivity in the Quaternary Intermetallic Compound LnNi₂B₂C
R. J. Cava, H. Takagi, H. W. Zandbergen, J. J. Krajewski, W. F. Peck, Jr., T. Siegrist, B. Batlogg, R. B.van Dover, R. J. Felder, K. Mizuhashi, J. O. Lee, H. Eisaki, and S. Uchida
Nature 367, 252-253 (1994).
Local Octahedral Tilts in La_2-xBa_xCuO₄: Evidence for a New Structural Length Scale
S. J. L. Bellinge, G. H. Kwei, and H. Takagi
Physical Review Letters 72, 2282-2285 (1994).
Scaling of the Temperature Dependent Hall Effect in La_2-xSr_xCuO₄H. Y. Hwang, B. Batlogg, H. Takagi, H. L. Kao, J. Kwo, R. J. Cava, J. J. Krajewski, and W. F. Peck
Physical Review Letters 72, 2636-2639 (1994).
Charge Dynamics in (La,Sr)₂CuO₄ - from Underdoping to Overdoping
B. Batlogg, H. Y. Hwang, H. Takagi, H. L. Kao, J. Kwo, R. J. Cava
Journal of Low Temperature Physics 95, 23-31 (1994).
Superconductivity in RPt₂B₂C
R. J. Cava, B. Batlogg, T. Siegrist, J. J. Krajewski, W. F. Peck, S. Carter, R. J. Felder, H. Takagi, and R. B. Vandover
Physical Review B 49, 12384-12387 (1994).
Localized-To-Itinerant Electron Transition In Sr₂Ir_1-XRu_xO₄R. J. Cava, B. Batlogg, K. Kiyono, H. Takagi, J. J. Krajewski, W. F. Peck, L. W. Rupp, and C. H. Chen
Physical Review B 49, 11890-11896 (1994).
Stabilization of Superconducting LnPt₂B₂C By Partial substitution of gold or platinum
R. J. Cava, B. Batlogg, J. J. Krajewski, W. F. Peck, T .Siegrist, R. M. Fleming, S. Carter, H. Takagi, R.J. Felder, R. B. Vandover, and L. W. Rupp
Physica C 226, 170-174 (1994).
Local-Structure And Superconductivity in La_2-XBa_xCuO₄ for x=0.125 And x=0.15
S. J. L. Billinge, G. H. Kwei, and H. Takagi
Physica B 199, 244-245 (1994).
Competition between Magnetism and Superconductivity in the New Rare-earth Boride Carbides
H. Eisaki, H. Takagi, R. J. Cava, B. Batlogg, J. J. Krajewski, and W. F. Peck, Jr., K. Mizuhashi, J. O. Lee, and S. Uchida
Physical Review B 50, 647-650 (1994).
Superconducting Properties of the New Boride-carbide Superconductors
H. Takagi, R. J. Cava, H. Eisaki, J. O. Lee, K. Mizuhashi, B. Batlogg, S. Uchida, J. J. Krajewski, and W. F. Peck, Jr.
Physica C 228, 389-392 (1994).
Electron Density of States in the Borocarbide Intermetallic Superconductors
S. A. Carter, B. Batlogg, R. J. Cava, J. J. Krajewski, W. F. Peck, Jr., and H. Takagi
Physical Review B 50, 4216-4219 (1994).
B-11 NMR Study in the New Boride Carbide Superconductor LuNi₂B₂C
K. Ikushima, J. Kikuchi, H. Yasuoka, R. J. Cava, H. Takagi, J. J. Krajewski, and W. F. Peck, Jr.
Journal of the Physical Society of Japan 63, 2878-2881 (1994).
Interplane Charge Transport in YBa₂Cu₃O_7-y: Spin-Gap Effect on In-plane and Out-of-plane Resistivity
K. Takenaka, K. Mizuhashi, H. Takagi, and S. Uchida
Physical Review B 50, 6534-6537 (1994).
Photoemission and Inverse-photoemission Study of Superconducting YNi₂B₂C
A. Fujimori, T. Kobayashi, T. Mizokawa, K. Mamiya, A. Sekiyama, H. Eisaki, H. Takagi, S. Uchida, R. J. Cava, J. J. Krajewski, and W. F. Peck, Jr.
Physical Review B 50, 9660-9663 (1994).
Elementary physical properties and crystal structures of LaRh₂B₂C and LaIr₂B₂C
R.J. Cava, T. Siegrist, B. Batlogg, H. Takagi, H. Eisaki, S. A. Carter, J. J. Krajewski, and W. F. Peck
Physical Review B 50, 12966-12968 (1994).
Superconductivity in Lanthanum Nickel Boro-nitride
R. J. Cava, H. W. Zandbergen, B. Batlogg, H. Eisaki, H. Takagi, J. J. Krajewski, W. F. Peck,Jr., E. M. Gyrogy, and S. Uchida
Nature 372, 245-247 (1994).
Good News from an Abandoned Gold Mine: A New Family of Quaternary Intermetallic Superconductors
R. J. Cava, H. Takagi, H. Eisaki, H. W. Zandbergen, T. Siegrist, B. Batlogg, J. J. Krajewski, W. F. Peck, Jr., S. Carter, K. Mizuhashi, J. O. Lee, S. Uchida, R. Felder, and R. B. van Dover
Physica C 235-240, 154-157 (1994).
Interplane Charge Dynamics in High-Temperature Superconductors: Charge Confinement and Spin Gap
S. Uchida, K. Tamasaku, K. Takenaka, and H. Takagi
Journal of Low Temperature Physics 95, 109-121 (1994).
Interplane Charge Dynamics in La_2-xSr_xCuO₄K. Tamasaku, T. Ito, H. Takagi, and S. Uchida
Physical Review Letters 72, 3088-3091 (1994).
Normal State Phase Diagram of (La,Sr)₂CuO₄ from Charge and Spin Dynamics
B. Batlogg, H. Takagi, H. Y. Hwang, R. J. Cava, H. L. Kao, and J. Kwo
Physica C 236-240, 130-133 (1994).
Spin Gap Effect on Anisotropic Resistivities Measured on Untwinned YBa₂Cu₃O_7-yK. Takenaka, K. Mizuhashi, H. Takagi, and S. Uchida
Physica C 235-240, 1339-1340 (1994).
Tunneling Spectroscopic Measurements on Boride Carbide Superconductors
T. Hasegawa, M. Ogino, A. Takagi, E. Watanabe, M. Nantoh, H. Takagi, S. Uchida, R. J. Cava, and K. Kitazawa
Physica C 235-240, 1859-1860 (1994).
Pressure-Induced Charge in T_c in New Boride Carbide Superconductors
C. Murayama, N. Mori, H. Takagi, H. Eisaki, K. Mizuhashi, S. Uchida, and R. J. Cava
Physica C 235-240, 2545-2546 (1994).
Competition between Magnetism and Superconductivity in the New Rare Earth Nickel Boride Carbides
H. Eisaki, H. Takagi, R. J. Cava, K. Mizuhashi, J. O. Lee, S. Uchida, B. Batlogg, J. J. Krajewski, and W. F. Peck, Jr.
Physica C 235-240, 2539-2540 (1994).
Structural ground-state of La₂CuO₄ in the LTO phase: Evidence of local disorder
S. J. L. Billinge, G. H. Kweia, and H. Takagi
Physica C 235, 1281-1282 (1994).
µ-SR Experiments on a Haldane System (Y_1-xCa_x)₂BaNiO₅K. Kojima, A. Keren, L. P. Le, G. M. Luke, W. D. Wu, Y. J. Uemura, K. Kiyono, S. Miyasaka, H. Takagi, and S. Uchida
Journal of Magnetism and Magnetic Materials 140-144, 1657-1658 (1995).
Muon Spin Relaxation, and Magnetic Susceptibility Measurements in the Haldane System Y_2-xCa_xBaNi_1-yMg_yO₅K. Kojima, A. Keren, L. P. Le, G. M. Luke, B. Nachumi, W. D. Wu, Y. J. Uemura, K. Kiyono, S. Miyasaka, H. Takagi, and S. Uchida
Physical Review Letters 74, 3471-3474 (1995).
de Haas-van Alphen Oscillations of LuNi₂B₂C in Pulsed High Magnetic Fields
M. Tokunaga, N. Miura, H. Takagi, and R. J. Cava
Journal of the Physical Society of Japan 64, 1458-1461 (1995).
Magnetoresistance in Metallic Crystals of La_1-xSr_xCoO₃S. Yamaguchi, H. Taniguchi, H. Takagi, T. Arima, and Y. Tokura
Journal of the Physical Society of Japan 64, 1885-1888 (1995).
Soft X-ray-emission Studies of YNi₂B₂C and LaNi₂B₂C: Observation of B 2p and C 2p Partial Density of States
S. Shin, A. Agui, M. Watanabe, M. Fujisaw, Y. Tezuka, T. Ishii, M. Hinomaru, and H. Takagi
Physical. Review B 52, 15082-15085 (1995).
Spectral weight transfer and mass renormalization in LnNi₂B₂C (Ln=Y, La)
A .Fujimori, K. Kobayashi, T. Mizokawa, K. Mamiya, A. Sekiyama, H. Takagi, H. Eisaki, S. Uchida, R. J. Cava, J. J. Krajewski, W. F. Peck
Journal of Physics And Chemistry of Solids 56, 1875-1876 (1995).
In-plane and Out-of-plane Magnetoresistance in La_2-xSr_xCuO₄ Single Crystals
T. Kimura, S. Miyasaka, H. Takagi, K. Tamasaku, H. Eisaki, S. Uchida, K. Kitazawa, M. Hiroi, M. Sera, and N. Kobayashi
Physical Review B 53, 8733-8742 (1996).
Photoemission Study of Ni Borocarbides: Superconducting YNi₂B₂C and Nonsuperconducting LaNi₂B₂C
K. Kobayashi, T. Mizokawa, K. Mamiya, A. Sekiyama, Fujimori, H. Takagi, H. Eisaki, S. Uchida, R. J. Cava, J. J. Krajewski, and W. F. Peck, Jr.
Physical Review B 54, 507-514 (1996).
Y₂BaNiO₅: A Nearly Ideal Realization of the S = 1 Heisenberg Chain with Antiferromagnetic Interactions
G. Xu, J. F. DiTusa, T. Ito, K. Oka, H. Takagi, C. Broholm, and G. Aeppli
Physical Review B 54, R6827-R6830 (1996).
Light-induced ferromagnetism in III-V-based diluted magnetic semiconductor heterostructures
H. Munekata, T. Abe, S. Koshihara, A. Oiwa, M. Hirasawa, S. Katsumoto, Y. Iye, C .Urano, and H. Takagi
Journal of Applied Physics 81, 4862-4864 (1997).
Magnetic Properties in the Normal State of LuNi₂B₂C Observed by ⁶¹Ni and ¹¹B NMR
K. Ikushima, H. Yasuoka, A. Ohno, H. Takagi, R. J. Cava, J. J. Krajewski, and W. F. Peck, Jr.
Journal of the Physical Society of Japan 66, 1130-1137 (1997).
Search for magnetic order in undoped and doped spin-gap systems by μSR
K. Kojima, A. Keren, L. P. Le, M. Larkin, G. M. Luke, B. Nachumi, W. D. Wu, Y. J. Uemura, M. Azuma, M. Takano, K. Kiyono, S. Miyasaka, N. Motoyama, H. Takagi, S. Uchida, M. Hase, Y. Sasago, K. Uchinokura, M. Matsuda, K. Katsumata, A. Revcolevschi, and R. J. Cava
Hyperfine Interactions 104, 37-42 (1997).
Ferromagnetic Order Induced by Photogenerated Carriers in Magnetic III-V Semiconductor Heterostructures of (In, Mn)As/GaSb
S. Koshihara, A. Oiwa, M. Hirasawa, S. Katsumoto, Y. Iye, C. Urano, H. Takagi, and H. Munekata
Physical Review Letters 78, 4617-4620 (1997).
Borocarbide Superconductors: Materials and Physical Properties
H. Takagi, M. Nohara, and R. J. Cava
Physica B 237-238, 292-295 (1997).
Magnetic Field Dependence of the Low-Temperature Specific Heat of the Borocarbide Superconductor LuNi₂B₂C
M. Nohara, M. Isshiki, H. Takagi, and R. J. Cava
Journal of the Physical Society of Japan 66, 1888-1891 (1997).
Switching of the gapped singlet spin-liquid state to an antiferromagnetically ordered state in Sr(Cu_1-xZn_x)(2)O-3
M. Azuma, Y. Fujishiro, M. Takano, M. Nohara, and H. Takagi
Physical Review B 55, R8658-R8661 (1997).
Impurity Effects on a 2-leg Spin Ladder Compound SrCu₂O₃M. Takano, M. Azuma, Y. Fujishiro, M. Nohara, H. Takagi, M. Fujiwara, H. Yasuoka, S. Ohsugi, Y. Kitaoka, and R. S. Eccleston
Physica C 282-287, 149-152 (1997).
Transport properties of oxygen-deficient perovskite La_8-xSr_xCu₈O₂₀T. Ito, H. Yamaguchi, K. Oka, K. Nozawa, and H. Takagi
Physica C 282, 1123-1124 (1997).
Anisotropic Resistivity of YBa₂Cu₄O₈: Incoherent to Metallic Crossover in the Out-of-plane Transport
N. E. Hussey, K. Nozawa, H. Takagi, S. Adachi, and K. Tanabe
Physical Review B 56, 11423-11426 (1997).
Hubbard Splitting and Electron Correlation in the Ferromagnetic Metal CrO₂T. Tsujioka, T. Mizokawa, J. Okamoto, A. Fujimori, M. Nohara, H. Takagi, K. Yamaura, and M. Takano
Physical Review B 56, 15509- 15512 (1997).
The RITA Spectrometer at Riso-design Considerations and Recent Results
K. N. Clausen, D. F. McMorrow, K. Lefmann, G. Aeppli, T. E. Mason, A. Schroder, M. Issikii, M. Nohara, and H. Takagi
Physica B 282, 50-55 (1997).
Impurity effects on a two-leg spin ladder compound SrCu₂O₃M. Azuma, Y. Fujishiro, M. Takano, M. Nohara, H. Takagi, S. Ohsugi, Y. Kitaoka, and R. S. Eccleston
Journal of Magnetism and Magnetic Materials 177, 655-656 (1998).
Magnetic Field Induced Dimensional Crossover in the Normal State of YBa₂Cu₄O₈N. E. Hussey, M. Kibune, H. Nakagawa, N. Miura, Y. Iye, H. Takagi, S. Adachi, and K. Tanabe
Physical Review Letters 80, 2909-2912 (1998).
Spin-Charge Separation in Single Chain Compound Sr₂CuO₃ Studied by Angle Resolved Photoemission
H. Fujisawa, T. Yokoya, T. Takahashi, S. Miyasaka, M. Kibune, and H. Takagi
Solid State Communications 106, 543-547 (1998).
Preparation of YBa₂Cu₄O₈ Single Crystals in Y₂O₃ Crucible Using O₂-HIP Apparatus
S. Adachi, K. Nakanishi, K. Tanabe, K. Nozawa, H. Takagi, W. Z. Hu, and M. Izumi
Physica C 301, 123-128 (1998).
Muon spin relaxation study of the stripe phase order in La_1.6-xNd_0.4Sr_xCuO₄ and related 214 cuprates
B. Nachumi, Y. Fudamoto, A. Keren, K. M. Kojima, M. Larkin, G. M. Luke, J. Merrin, O. Tchernyshyov, and Y. J. Uemura, N. Ichikawa, M. Goto, H. Takagi, S. Uchida, M. K. Crawford, E. M. McCarron, D. E. MacLaughlin, and R. H. Heffner
Physical Review B 58, 8760-8772 (1998).
Resonant inverse photoemission study of NiS_2-xSe_xH. Ishii, K. Kanai, Y. Tezuka, S Shin, S. Miyasaka, and H. Takagi
Journal of Electron Spectroscopy and Related Phenomena 92, 77-80 (1998).
Thermally Induced Insulator-Metal Transition in LaCoO₃: A View Based on the Mott Transition
Y. Tokura, Y. Okimoto, H. Taniguchi, T. Kimura, and H. Takagi
Physical Review B 58, 1699-1702 (1998).
Temperature and Substitution Dependence of the Photoemission Spectra of FeSi
T. Susaki, T. Mizokawa, A. Fujimori, A. Ohno, T. Tonogai, and H. Takagi
Physical Review B 58, 1197-1200 (1998).
Photocarrier Induced Ferromagnetic Order in III-V-based Magnetic Semiconductor Heterostructure of (In,Mn)As/GaSb
S. Koshihara, H. Munekata, A. Oiwa, M. Hirasawa, S. Katsumoto, Y. Iye, C. Urano, and H. Takagi
Physica E 2, 417-420 (1998).
Dynamical Aspects of the Photo-induced Spin-crossover Transition in [Fe(2-pic)(3)]Cl-2-EtOH Single Crystals
A. Mino, Y. Ogawa, S.-Y. Koshihara, C. Urano, H. Takagi
Molecular Crystals And Liquid Crystals Science And Technology Section A-Molecular Crystals And Liquid Crystals 314, 107-112 (1998).
Crystal Structure, Magnetic and Transport Properties and Electronic B and Structure of A₂Mn₂O₇ Pyrochlores (A=Y, In, Lu, Tl)
Y. Shimakawa, Y. Kubo, N. Hamada, J. D. Jorgensen, A. Hu, S. Short, M. Nohara, and H. Takagi
Physical Review B 59, 1249-1254 (1999).
Charge-stripe ordering from local octahedral tilts: Underdoped and superconducting La2-xSrxCuO4 (0 <= x <= 0.30)
E. S. Bozin, Sj.J. L. Billinge, G. H. Kwei, and H. Takagi
Physical Review B 59, 4445-4454 (1999).
Angle-resolved Photoemission Study of Sr₂CuO₃H. Fujisawa, T. Yokoya, T. Takahashi, S. Miyasaka, M. Kibune, and H. Takagi
Physical Review B 59, 7358-7361 (1999).
Quasiparticle Density of States of Clean and Dirty s-wave Superconductors in the Vortex States
M. Nohara, M. Issiki, F. Sakai, and H. Takagi
Journal of the Physical Society of Japan 68, 1078-1081 (1999).
High-Pressure Synchrotron-Diffraction Study of the Superconducting Spin-ladder Compounds (Sr, M)₁₄Cu₂₄O₄₁ (M = Ca, Ba, Nd)
S. Pachot, P. Bordet, R. J.Cava, C. Chaillout, C. Darie, M. Hanfl, M. Marezio, and H. Takagi
Physical Review B 59, 12048-12053 (1999).
Melting of the Vortex Lattice in YBa₂Cu₄O₈ in Parallel Fields
N. E. Hussey, H. Takagi, N. Takeshita, N. Mori, Y. Iye, S. Adachi, and K. Tanabe
Physical. Review B 59, R11668-11671 (1999).
Spin Gap and Magnetic Coherence in a Clean High-temperature Superconductor
B. Lake, G. Aeppli, T. E. Mason, A. Schroder, D. F. McMorrow, K. Lefmann, M. Isshiki, M. Nohara, H. Takagi, and S. M. Haydon
Nature 400, 43-46 (1999).
Vortex Lattice Melting in YBa₂Cu₄O₈ with H Parallel to ab
N. E. Hussey, H. Takagi, N. Mori, N. Takeshita, Y. Iye, S. Adachi, K. Tanabe
Journal of Superconductivity 12, 583-586 (1999).
Correlation Effects in the Electronic Structure of SrRuO₃J. Okamoto, T. Mizokawa, A. Fujimori, I. Hase, M. Nohara. H. Takagi, Y. Takeda, and M. Takano
Physical Review B 60, 2281-2285 (1999).
Magnetism in La_8-xSr_xCu₈O₂₀: A hybird system with localized one-dimensional Cu-O chains and an itinerant three-dimensional Cu-O network
T. Ito, H. Yamaguchi, K. Oka, K. Nozawa, and H. Takagi
Physical Review B 60, 15031-15034 (1999).
The critical role of the CuO chains in Metallizing the C-axis in YBa₂Cu₃O_7-δN. E. Hussey, H. Takagi, S. Tajima, A. I. Rykov, and K. Yoshida
Journal of Low Temperature Physics 117, 1271-1275 (1999).
Transport Properties of Metallic LiV₂O₄ Single Crystals - Heavy Mass Fermi Liquid Behavior
H. Takagi, C. Urano, S. Kondo, M. Nohara, and Y. Ueda
Materials Science And Engineering B-Solid State Materials For Advanced Technology 63, 147-150 (1999).
Anisotropic Spin Freezing in the S = 1/2 Zigzag Chain Compound SrCuO₂I. A. Zaliznyak, C. Broholm, M. Kibune, M. Nohara, and H. Takagi
Physical Review Letters 83, 5370-5373 (1999).
Low Temperature Specific Heat Study of SrCu₂(BO₃)₂ with an Exactly Solvable Ground State
H. Kageyama, K. Onizika, Y. Ueda, M. Nohara, H. Suzuki, and H. Takagi
Journal of Experimental, and Theoretical Physics 90, 129-132 (2000).
Growth and Anisotropic Resistivity of PrBa₂Cu₄O₈ and Pr₂Ba₄Cu₇O_15-ySingle Crystals: A Direct Probe of Metallic Cu-O Double Chains
S. Horii, U. Mizutani, H. Ikuta, Y. Yamada, J. H. Ye, A. Matsushita, N. E. Hussey, H. Takagi, and I. Hirabayashi
Physical Review B 61, 6327-6333 (2000).
The Effect of Zn-Doping on the Magnetic Field Induced Dimensional Crossover in YBa₂Cu₄O₈K. Waku, N. E. Hussey, F. Sakai, M. Nohara, H. Takagi, H. Nakagawa, N. Miura, and S. Adachi
Journal of the Physical Society of Japan 69, 21-24 (2000).
Charge Confinement on the CuO₂ Planes in Slightly Overdoped YBa₂Cu₃O_7-δand the Role of Metallic Chains
N. E. Hussey, H. Takagi, Y. Iye, S. Tajima, A. I. Rykov, and K. Yoshida
Physical Review B 61, R6475-R6478 (2000).
Dynamical Aspects of the Photo-induced Phase Transition in Spin-Crossover Complexes
Y. Ogawa, S. Koshihara, K. Koshino, T. Ogawa, C. Urano, and H. Takagi
Physical Review Letters 84, 3181-3184 (2000).
Specific heat study of SrCu₂(BO₃)₍₂₎H Kageyama, H Suzuki, M Nohara, K Onizuka, H. Takagi, Y Ueda
Physica B 281, 667-668 (2000).
Spin-1/2 Heisenberg Antiferromagnetic Chains in the Frustrated Spinel Lattice of GeCu₂O₄T. Yamada, Z. Hiroi, M. Takano, M. Nohara, and H. Takagi
Journal of the Physical Society of Japan 69, 1477-1483 (2000).
Metal-insulator transition in 1T-TaS_2-xSe_xO. Shiino, T. Watanabe, T. Endo, T. Hanaguri, K. Kitazawa, M. Nohara, H. Takagi, C. Murayama, N. Takeshita, N. Mori, T. Hasegawa, W. Yamaguchi
Physica B 284, 1673-1674 (2000).
Neutron Diffraction Evidence of Microscopic Charge Inhomogeneities in the CuO₂ Plane of Superconducting La_2-x Sr_xCuO₄(0≦x≦0.30)
E. S. Bozin, G. H. Kwei, H. Takagi, and S. J. L. Billinge
Physical Review Letters 84, 5856-5859 (2000).
Quasiparticle Density of States of Clean and Dirty d-Wave Superconductors: Mixed-State Specific Heat of La_2-xSr_xCuO₄ Single Crystals
M. Nohara, H. Suzuki, M. Isshiki, N. Mangkorntong, F. Sakai, and H. Takagi
Journal of the Physical Society of Japan 69, 1602-1605 (2000).
Anomalous Field Dependence of the Vortex-Core Radius and Magnetic Penetration Depth in YNi₂B₂C Probed by µSR
K. Ohishi, K. Kakuta, J. Akimitsu, W. Higemoto, R. Kadono, R. I. Miller, A. Price, R. F. Kiefl, J. E. Sonier, M. Nohara, H. Suzuki, and H. Takagi
Physica B 289-290, 377-380 (2000).
Transport Properties of Hybrid Magnetic System La_8-xSr_xCu₈O₂₀T. Ito, H. Yamaguchi, K. Oka, K. Nozawa, and H. Takagi
Physica B 284, 1379-1380, Part 2 (2000).
Holes in a Quantum Spin Liquid
G. Xu, G. Aeppli, M. E. Bisher, C. Broholm, J. F. Ditusa, C. D. Frost, T. Ito, K. Oka, R. L. Paul, H. Takagi, and M. M. J. Treacy
Science 289, 419-422 (2000).
LiV₂O₄ Spinel as a Heavy-Mass Fermi Liquid: Anomalous Transport and Role of Geometrical Frustration
C. Urano, M. Nohara, S. Kondo, F. Sakai, H. Takagi, T. Shiraki, and T. Okubo
Physical Review Letters 85, 1052-1055 (2000).
From the Geometrically Frustrated Antiferromagnets ZnV₂O₄ and ZnCr₂O₄ to the Heavy-Mass Fermi Liquid LiV₂O₄S. Kondo, C. Urano, Y. Kurihara, M. Nohara, and H. Takagi
Journal of the Physical Society of Japan 69 Suppl. B, 139-143 (2000).
Photo-induced spin state transition and its dynamics in spin-crossover complexes
Y. Ogawa, S. Koshihara, C. Urano, and H. Takagi
Molecular Crystals And Liquid Crystals 345, 497-502 (2000).
Metal-insulator Transition, and Itinerant Antiferromagnetism in NiS_2-xSe_x Pyrite
S. Miyasaka, H. Takagi, H. Takahashi, N. Mori, and R. J. Cava
Journal of the Physical Society of Japan 69, 3166-3169 (2000).
Absence of Residual Quasiparticle Conductivity in the Underdoped Cuprate YBa₂Cu₄O₈N. E. Hussey, S. Nakamae, K. Behnia, H. Takagi, C. Urano, S. Adachi, and S. Tajima
Physical Review Letters 85 ,4140-4143 (2000).
Microscopic Charge Inhomogeneities in Underdoped La_2-xSr_xCuO₄: Local Structural Evidence underdoped
S. J. L. Billinge, E. S. Bozin, M. Gutmann, and H. Takagi
Journal of Superconductivity 13, 713-722 (2000).
Ultrahigh-Resolution Photoemission Spectroscopy of Ni Borocarbides: Direct Observatio of the Superconducting Gap and a Change in Gap Anisotropy by Impurity
T. Yokoya, T. Kiss, T. Watanabe, S. Shin, M. Nohara, H. Takagi, and T. Oguchi
Physical Review Letters, 4952-4955 (2000).
Metal-Insulator Transition and Itinerant Antiferromagnetism in NiS_2-xSe_x Pyrite
S. Miyasaka, H. Takagi, Y. Sekine, H. Takahashi, N. Mori, and R. J. Cava
Journal of the Physical Society of Japan 69, 3166-3169 (2000).
Impurity-induced gap renormalization in anisotropic superconductors: Mixed-state specific heat of La_2-xSr_x(Cu_1-yZn_y)O₄and Y(Ni_1-xPt_x)₂B₂C
M Nohara, H Suzuki, N Mangkorntong, H. Takagi
Physica C 341, 2177-2180 (2000).
Local Structural Evidence for Inhomogeneous Charge Distribution in CuO₂ Planes of Superconducting La_2-xSr_xCuO₄E. S. Bozin, S. J. L. Billinge, G. H. Kwei, and H. Takagi
Physica C 341, 1793-1794, Part 3 (2000).
Images of Interlayer Josephson Vortices in Single-layer Cuprates
K. A. Moler, J. R. Kirtley, R. X. Liang, D. A. Bonn, W. N. Hardy, J. M. Williams, J. A. Schlueter, D. Hinks, G. Villard, A. Maignan, M. Nohara, and H. Takagi
Physica C 341, 977-980, Part 2 (2000).
Materials & properties
H. Takagi
Physica C 341, 40244 (2000).
Spins in the Vortices of a High-Tempreture Superconductor
B. Lake, G. Appli, K. N. Clausen, D. F. McMorrow, K. Lefmann, N. E. Hussey, N. Mangkorntong, M. Nohara, H. Takagi, T. E. Mason, and A. Schröder
Science 291, 1759-1762 (2001).
Coupling between Magnetism and Dielectric Properties in Quantum Paraelectric EuTiO₃
T. Katsufuji, and H. Takagi
Physical Review B 64, 54415 (2001).
Charge Ordering in the Geometrically Frustrated Spinel AlV₂O₄K. Matsuno, T. Katsufuji, S. Mori, Y. Moritomo, A. Machida, E. Nishibori, M. Takata, N. Yamamoto, and H. Takagi
Journal of the Physical Society of Japan 70, 1456-1459 (2001).
Impurity Induced Gap Modification in Anisotropic Superconductors: Mixed-state Specific Heat of La_2-xSr_x(Cu_1-yZn_y)O₄ and Y(Ni_1-xPt_x)₂B₂C
M. Nohara, H. Suzuki, N. Mangkorntong, and H. Takagi
Physica C 357-360, 42-45 (2001).
Dielectric and Magnetic Anomalies and Spin Frustration in Hexagonal RMnO₃(R = Y, Yb, and Lu)
T. Katsufuji, S. Mori, M. Masaki, Y. Moritomo, N. Yamamoto, and H. Takagi
Physical Review B 64, 104419 1-6 (2001).
Effects of Hole Doping in FeSi: Photoemission Study of FeSi_1-xAl_xT. Susaki, K. Kobayashi, A. Fujimori, A. Ohno, T. Tonogai, and H. Takagi
Physical Review B 64, 153106 1-4 (2001).
Spin-1/2 Kagome-Like Lattice in Volborthite Cu₃V₂O₇(OH)₂・2H₂O
Z. Hiroi, M. Hanawa, N. Kobayashi, M. Nohara, H. Takagi, Y. Kato, and M. Takigawa
Journal of the Physical Society of Japan 70, 11, 3377-3384 (2001).
Fermi Surface Sheet-Dependent Superconductivity in 2H-NbSe₂T. Yokoya, T. Kiss, A. Chainani, S. Shin, M. Nohara, and H. Takagi
Science 294, 2518-2520 (2001).
Antiferromagnetic Order Induced by an Applied Magnetic Field in a High-Temperature Superconductor
B. Lake, H. M. Ronnow, N. B. Christensen, G. Aeppli, K. Lefmann, D. F. McMorrow, P. Vorderwisch, P. Smeibidl, N. Mangkorntong, T. Sasagawa, M. Nohara, H. Takagi, and T. E. Mason
Nature 415, 299-302 (2002).
Chromatographic purification of Kr@C₆₀T. Suetsuna, N. Dragoe, H. Shimotani, A. Takeda, S. Ito, R. J. Cross, M. Saunders, H. Takagi , and K. Kitazawa
Fullerenes Nanotubes and Carbon Nanostructures 10, 15-21 (2002).
Copper Pyrites CuS₂ and CuSe₂ as Anion Conductors
H. Ueda, M. Nohara, K. Kitazawa, H. Takagi, A. Fujimori, T. Mizokawa, and T. Yagi
Physical Review B 65, 155104 (2002).
Fermi Surface, and Superconducting Gap of 2H-NbSe₂ Using Low-Temperature Ultrahigh-Resolution Angle-Resolved Photoemission Spectroscopy
T. Kiss, T. Yokoya, A. Chainani, S. Shin, M. Nohara, and H. Takagi
Physica B 312, 666-667 (2002).
Strong Carrier Concentration Dependence of Pressure Effect on Bipolaronic Transitions in Magneli Phase Ti_nO_2n-1 (n=4,5,6)
H. Ueda, K. Kitazawa, H. Takagi, and T. Matsumoto
Journal of the Physical Society of Japan 71, 1506-1510 (2002).
Nonlocal Effects and Shrinkage of the Vortex Core Radius in YNi₂B₂C Probed by Muon Spin Rotation
K. Ohishi, K. Kakuta, J. Akimitsu, W. Higemoto, R. Kadono, J. E. Sonier, A. N. Price, R. I. Miller, R. F. Kiefl, M. Nohara, H. Suzuki, and H. Takagi
Physical Review B 65, 140505 1-4 (2002).
Structural and Magnetic Instabilities of La_2-xSr_xCaCu₂O₆C. Ulrich, S. Kondo, M. Reehuis, H. He, C. Bernhard, C. Niedermayer, F. Bouree, P. Bourges, M. Ohl, H. M. Ronnow, H. Takagi , and B. Keimer
Physical Review B 65, 220507 1-4 (2002).
Electron-Doped Superconductor La_2-xCe_xCuO₄: Preparation of Thin Films and Modified Doping Range for Superconductivity
A. Sawa, M. Kawasaki, H. Takagi, and Y. Tokura
Physical Review B 66, 14531 (2002).
Vortex Magnetism in the High-Temperatures Superconductor La_2-xSr_xCuO₄B. Lake, T. E. Mason, G. Aeppli, K. Lefmann, N. B. Christensen, D. F. McMorrow, K. N. Clausen, H. M. Ronnow, P. Vorderwisch, P. Smeibidl, N. Mangkorntong, N. E. Hussey, T. Sasagawa, M. Nohara, H. Takagi, and A. Schroder
International Journal of Modern Physics B 16, 3155-3155 (2002).
Photophysical and photochemical processes of an unsymmetrical fullerene dimer, C-121
M. Fujitsuka, O. Ito, N. Dragoe, S. Ito, H. Shimotani, H. Takagi, K. Kitazawa
Journal of Physical Chemistry B 106, 8562-8568 (2002).
Charge Dynamics and Possibility of Ferromagnetism in A_1-xLa_xB₆(A = Ca and Sr)
K. Taniguchi, T. Katsufuji, F. Sakai, H. Ueda, K. Kitazawa, and H. Takagi
Physical Review B 66, 64407, 1-7 (2002).
Dimensionality of the Cu-O Double-Chain Site of PrBa₂Cu₄O₈S. Horii, H. Takagi, H. Ikuta, N. E. Hussey, I. Hirabayashi, and U. Mizutani
Physical Review B 66, 54530 (2002).
Disorder Effects in the Bipolaron System Ti₄O₇ Studied by Photoemission Spectroscopy
K. Kobayashi, T. Susaki, A. Fujimori, T. Tonogai, and H. Takagi
Europhysics Letters 59, 868-874 (2002).
Field-induced Antiferromagnetism in the High-Temperature Superconductor La_2-xSr_xCuO₄B. Lake, T. E. Mason, G. Aeppli, K. Lefmann, N. B. Christensen, D. F. McMorrow, K. N. Clausen, H. M. Ronnow, P. Vorderwisch, P. Smeibidl, N. Mangkorntong, N. E. Hussey, T. Sasagawa, M. Nohara, H. Takagi, and A. Schroder
International Journal of Modern Physics B 16, 3197-3197 (2002).
Gap Function with Point Nodes in Borocarbide Superconductor YNi₂B₂C
K. Izawa, K. Kamata, Y. Nakajima, Y. Matsuda, T. Watanabe, M. Nohara, H. Takagi, P. Thalmeier, and K. M. Maki
Physical Review Letters 89, 137006 (2002).
Growth of Na-Doped Ca₂CuO₂Cl₂ Single Crystals under High Pressures of Several GPa
Y. Kohsaka, M. Azuma, I. Yamada, T. Sasagawa, T. Hanaguri, M. Takano, and H. Takagi
Journal of the American Chemical Society 124, 12275-12278 (2002).
Crystal Structure and Magnetic Properties of Hexagonal RMnO₃ (R = Y, Lu, and Sc) and the Effect of Doping
T. Katsufuji, M. Masaki, A. Machida, M. Moritomo, K. Kato, E. Nishibori, M. Takata, M. Sakata, K. Ohoyama, K. Kitazawa, and H. Takagi
Physical Review B 66, 134434 (2002).
Unique Identification of Zhang-Rice Singlet Excitation in Sr₂CuO₂Cl₂ Mediated by the O 1s Core Hole: Symmetry-Selective Resonant Soft X-ray Raman Scattering Study
Y. Harada, K. Okada, R. Eguchi, A. Kotani, H. Takagi, T. Takeuchi, and S. Shin
Physical Review B 66, 165104 (2002).
Single-Crystal Growth of Transition Metal Oxides at High Pressures of Several GPa
M. Azuma, T. Saito, S. Ishiwata, H. Yoshida, M, Takano, Y. Kohsaka , H. Takagi, and W. Utsumi
Journal of Physics: Condensed Matter 14, 11321-11324 (2002).
Separation of N₂@C₆₀ and N@C₆₀T. Suetsuna, N. Dragoe, W. Harneit, A. Weidinger, H. Shimotani, S. Ito, H. Takagi, and K. Kitazawa
Chemistry European Journal 8, 5079-5083 (2002).
Effects of Superconducting Gap Anisotropy on the Flux Flow Resistivity in Y(Ni_1-xPt_x)₂B₂C
K. Takaki, A. Koizumi, T. Hanaguri, M. Nohara, H. Takagi, K. Kitazawa, Y. Kato, Y. Tsuchiya, H. Kitano, and A. Maeda
Physical Review B 66, 184511 (2002).
Charge Transport Near Pressure-induced Antiferromagnetic Quantum Critical Point in Magneli-phase Vanadium Oxides
H. Ueda, K. Kitazawa, T. Matsumoto, and H. Takagi
Solid State Communications 125, 83-87 (2003).
Charge Ordering and Spin Frustration in AlV_2-xCr_xO₄K. Matsuno, T. Katsufuji, S. Mori, M. Nohara, A. Machida, Y. Moritomo, K. Kato, E. Nishibori, M. Takata, M. Sakata, K. Kitazawa, and H. Takagi
Physical Review Letters 90, 96404 (2003).
Uniaxial Pressure Control of Superconductivity via Stripe Instability in La _1.64Eu_0.2Sr_0.16CuO₄ Crystals
T. Sasagawa, T. Sugioka, N. Takeshita, K. Kitazawa, and H. Takagi
Journal of Low Temperature Physics 131, 395-399 (2003).
Field-induced Thermal Metal-to-Insulator Transition in Underdoped La_2-xSr_xCuO_4+δD. G. Hawthorn, R. W. Hill, C. Proust, F. Ronning, M. Sutherland, E. Boaknin, C. Lupien, M. A. Tanatar, J. Paglione, S, Wakimoto, H, Zhang, L, Taillefer, T, Kimura, M. Nohara, H. Takagi, and N. E. Hussey
Physical Review Letters 90, 197004 (2003).
Real Space Imaging of the Electronic States in Underdoped Ca_2-xNa_xCuO₂Cl₂ Single Crystals
Y. Kohsaka, T. Hanaguri, K. Kitazawa, M. Azuma, M. Takano, and H. Takagi
Journal of Low Temperature Physics 131, 299-303 (2003).
Fabrication of MgB₂ Thin Film on Boride Substrates by Pulsed Laser Deposition
Y. Hikita, T. Fukumura, T. Ito, M. Kawasaki, and H. Takagi
Journal of Low Temperature Physics 131, 1187-1191 (2003).
Superconducting Gap Structure of YNi₂B₂C Determined by Thermal Conductivity
K. Kamata, K. Izawa, Y. Nakajima, Y. Matuda, T. Watanabe, M. Nohara, H. Takagi, H. Takeya, P. Thalmeier, and K. M. Maki
Journal of Low Temperature Physics 131, 1095-1099 (2003).
Excess Quasiparticles outside the Vortex Cores in Y(Ni_1-xPt_x)₂B₂C
K. Ohishi, K. Kakuta, J. Akimitsu, A. Koda, W. Higemoto, R. Kadono, J. E. Sonier, A. N. Price, R. I. Miller, R. F. Kiefl, M. Nohara, H. Suzuki, and H. Takagi
Physica C 388, 197-198 (2003).
Evolution of a Metal to Insulator Transition in Ca_2-xNa_xCuO₂Cl₂ as Seen by Angle-Resolved Photoemission
F. Ronning, T. Sasagawa, Y. Kohsaka, K. M. Shen, A. Damascelli, C. Kim, T. Yoshida, N. P. Armitage, D. H. Lu, D. L. Feng, L. L. Miller, H. Takagi, and Z. X. Shen
Physical Review B 67, 165101 (2003).
ARPES Study on Electronic Evolution in Ca_2-xNa_xCuO₂Cl₂T. Sasagawa, F. Ronning, Y. Kohsaka, K. M. Shen, T. Yoshida, M. Azuma, M. Takano, Z. X. Shen, and H. Takagi
Physica C-Superconductivity And Its Applications 388, 307-308 (2003).
STM/STS Study on Ca_2-xNa_xCu₂Cl₂ Single Crystals
Y. Kohsaka, T. Hanaguri, K. Kitazawa, M. Azuma, M. Takano , and H. Takagi
Physica C 388, 283-284 (2003).
Evidence of Point Nodes in Superconducting Gap of Borocarbide Superconductor YNi₂B₂C
K. Kamata, K. Izawa, Y. Nakajima, Matsuda, T. Watanabe, M. Nohara, H. Takagi, H. Takeya, K. Hirata, P. Thalmeier, K. Maki
Physica C 388, 185-186 (2003).
Specific Heat Study of Magnetic Superconductor ErNi₂B₂C Single Crystal under Magnetic Fields
S. Nakao, T. Hanaguri, K. Hashimoto, M. Nohara, H. Takagi, and K. Kitazawa
Physica C 388, 179-180 (2003).
Thermal Conductivity across the Phase Diagram of Cuprates: Low-energy Quasiparticles, and Doping Dependence of the Superconducting Gap
M. Sutherland, D. G. Hawthorn, R. W. Hill, F. Ronning, S. Wakimoto, H. Zhang, C. Proust, E. Boaknin, C. Lupien, L. Taillefer, R. Liang, D. A. Bonn, W. N. Hardy, R. Gagnon, N. E. Hussey, T. Kimura, M. Nohara, and H. Takagi
Physical Review B 67, 174520 (2003).
Anomalous Quasiparticle Excitations in Y(Ni_1-xPt_x)₂B₂C
K. Ohishi, K. Kakuta, J. Akimitsu, A .Koda, W. Higemoto, R. Kadono, J. E. Sonier, A. N. Price, R. I. Miller, R. F. Kiefl, M. Nohara, H. Suzuki, H. Takagi
Physica B 326, 364-368 (2003).
Structure of End States for a Haldane Spin Chain
M. Kenzellmann, G. Xu, I. A. Zaliznyak, C. Broholm, J. F. Ditusa, G. Aeppli, T. Ito, K. Oka, and H. Takagi
Physical Review Letters 90, 087202 (2003).
Angle-Resolved Photoemission Spectroscopy of (Ca,Na)₂CuO₂Cl₂ Crystals: Fingerprints of a Magnetic Insulator in a Heavily Underdoped Superconductor
Y. Kohsaka, T. Sasagawa, F. Ronning, T. Yoshida, C. Kim, T. Hanaguri, M. Azuma, M. Takano, Z. X. Shen, and H. Takagi
Journal of the Physical Society of Japan 72, 1018-1021 (2003).
Anomaly of Quasi-particle Density of States in the Vortex State of NbSe₂
T. Hanaguri, A. Koizumi, K. Takaki, M. Nohara, H. Takagi, and K. Kitazawa
Physica B-Condensed Matter 329, 1355-1356, Part 2 (2003).
Contrast between Static- and Mobile-Impurity Effects on Haldane-Gap System Y₂BaNiO₅ Studied by Specific Heat
T. Ito, and H. Takagi
Physica B 329, 890-891, Part 2 (2003).
Soft X-ray Energy-Dependent Angle-Resolved Photoemission Study of CeIrIn₅T. Ito, P. A. Rayjada , N. Kamakura, Y. Takata , T. Yokoya , A. Chainani , S. Shin , M. Nohara, and H. Takagi
Journal of Physics: Condensed Matter 15, S2149-S2152, Sp. Iss. SI (2003).
Unconventional Spin Fluctuations in the Hexagonal Antiferromagnet YMnO₃T. J. Sato, S. H. Lee. T. Katsufuji, M. Masaki, S. Park, J. R. D. Copley, and H. Takagi
Physical Review B 68, 14432 (2003).
Single Crystal Growth of Transition Metal Oxides at High Pressures of Several Gpa
M. Azuma, T. Saito, S. Ishiwata, I. Yamada, Y. Kohsaka, H. Takagi, and M. Takano
Physica C 392, 22-28, Part 1 (2003).
Field-Effect Transistor on SrTiO₃ with Sputtered Al₂O₃ Gate Insulator
K. Ueno, I. H. Inoue, H. Akoh, M. Kawasaki, Y. Tokura, and H. Takagi
Applied Physics Letters 83, 1755-1757 (2003).
Electronic Ground State of Heavily Overdoped Nonsuperconducting La_2-xSr_xCuO₄S. Nakamae, K. Behnia, N. Mangkorntong, M. Nohara, H. Takagi, S. J. C. Yates, and N. E. Hussey
Physical Review B 68, 100502 (2003).
Correlation between the Superconducting and Structural Properties in MgB₂ Thin Films Prepared by Molecular-Beam Epitaxy
H. Yamazaki, Y. Hikita, H. Hori, and H. Takagi
Applied Physics Letters 83, 3740-3742 (2003).
Fully Gapped Single-particle Excitations in Lightly Doped Cuprates
K. M. Shen, T. Yoshida, D. H. Lu, F. Ronning, N. P. Armitage, W. S. Lee, X. J. Zhou, A. Damascelli, D. L. Feng, N. J. C. Ingle, H. Eisaki, Y. Kohsaka, H. Takagi, T. Kakeshita, S. Uchida, P. K. Mang, M. Greven, Y. Onose, Y. Taguchi, Y. Tokura, S. Komiya, Y. Ando, M. Azuma, M. Takano, A. Fujimori, Z. and X. Shen
Physical Review B 69, 54503 (2004).
Kr Extended X-ray Absorption Fine Structure Study of Endohedral Kr@C₆₀S. Ito, A. Takeda, T. Miyazaki, Y. Yokoyama, M. Saunders, R. J. Cross, H. Takagi, P. Berthet, and N. Dragoe
Journal of Physical Chemistry B 108, 3191-3195 (2004).
Spin Fluctuation in LiV₂O₄ Studied by Muon Spin Relaxation
A. Koda, R. Kadono, W. Higemoto, K. Ohishi, H. Ueda, C. Urano, S. Kondo, M. Nohara, and H. Takagi
Physical Review B 69, 12402 (2004).
Magnetocapacitance and Spin Fluctuations in the Geometrically Frustrated Magnets R₂Ti₂O₇ (R = rare earth)
T. Katsufuji, and H. Takagi
Physical Review B 69, 64422 (2004).
Anisotropy of the Superconducting Gap of the Borocarbide Superconductor YNi₂B₂C with Ultrasonic Attenuation
T. Watanabe. M. Nohara, T. Hanaguri, and H. Takagi
Physical Review Letters 92, 147002 (2004).
Field-Effect Transistor Based on KTaO₃ Perovskite
K. Ueno, I. H. Inoue, T. Yamada, H. Akoh, Y. Tokura, and H. Takagi
Applied Physics Letters 84, 3726-3728, (2004).
Effects of Magnetic Field on the Cuprate High-T_c Superconductor La_2-xSr_xCuO₄B. Lake, G. Aeppli, N. B. Christensen, K. Lefmann, D. F. McMorrow, K. N. Clausen, H. M. Ronnow, P.Vordewisch, P. Smeibidl, N. Mangkorntong, T. Sasagawa, M. Nohara, H. Takagi, and N. E. Hussey
Physica Status Solidi B-Basic Research 241, 1223-1228 （2004）.
Gigantic Anisotropic Uniaxial Pressure Effect on Superconductivity within the CuO₂ Plane of La_1.64Eu_0.2Sr_0.16CuO₄: Strain Control of Stripe Criticality
N. Takeshita, T. Sasagawa, T. Sugioka, Y. Tokura, and H. Takagi
Journal of the Physical Society of Japan 73, 1123-1126 （2004）.
Static and Dynamic Spins in Superconducting La_2-xSr_xCuO₄: The Riso years
K. Lefmann, B. Lake, G. Aeppli, S. W. Cheong, N. B. Christensen, K. N. Clausen, S. Hayden, T. E. Mason, D. F. McMorrow, H. A. Mook, H. M. Ronnow, and H. Takagi
Journal of Low Temperature Physics 135, 621-664 (2004).
An Unusual Isotope Effect in a High-Transition-Temperature Superconductor
G. H. Gweon, T. Sasagawa, S. Y. Zhou, J. Graf, H. Takagi, D. H. Lee, and A. Lanzara
Nature 430, 187-190 (2004).
Pressure-induced Transition from a Spin Glass to an Itinerant Ferromagnet in the Half-doped Manganite L_0.5Ba_0.5MnO₃ (L = Sm and Nd) with Quenched Disorder
N. Takeshita, C. Terakura, D. Akahoshi, Y. Tokura, and H. Takagi
Physical Review B 69, 180405 (2004).
A 'Checkerboard' Electronic Crystal State in Lightly Hole-doped Ca_2-xNa_xCuO₂Cl₂T. Hanaguri, C. Lupien, Y. Kohsaka, D. H. Lee, M. Azuma, M. Takano, H. Takagi, and J. C. Davis
Nature 430, 1001-1005 (2004).
Imaging Nanoscale Electronic Inhomogeneity in the Lightly Doped Mott Insulator Ca_2-xNa_xCuO₂Cl₂Y. Kohsaka, K. Iwaya, S. Satow, T. Hanaguri, M. Azuma, M. Takano, and H. Takagi
Physical Review Letters 93, 97004 (2004).
Spinons in the Strongly Correlated Copper Oxide Chains in SrCuO₂I. A. Zaliznyak, H. Woo, T. G. Perring, C. L. Broholm, C. D. Frost, and H. Takagi
Physical Review Letters 93, 87202 (2004).
Universality of the Mott-Ioffe-Regel Limit in Metals
N. E. Hussey, K. Takenaka, and H. Takagi
Philosophical Magazine 84, 2847-2864 (2004).
STM/STS study of metal-to-Mott-insulator transitions
T. Hanaguri, Y. Kohsaka, K. Iwaya, S. Satow, K. Kitazawa, H. Takagi, M. Azuma, and M. Takano
Physica C 408-410, 328-329 (2004).
Raman Study of the Metal-Insulator Transition in Pyrochlore Mo Oxides
K. Taniguchi, T. Katsufuji, S. Iguchi, Y. Taguchi, H. Takagi, and Y. Tokura
Physical Review B 70, 100401 (2004).
Dispersive Excitations in the High-Temperature Superconductor La_2-xSr_xCuO₄N. B. Christensen, D. F. McMorrow, H. M. Ronnow, B. Lake, S. M. Hayden, G. Aeppli, T. G. Perring, M. Mangkorntong, M. Nohara, and H. Takagi
Physical Review Letters 93, 147002 (2004).
Evolution of Local Electronic States from a Metal to a Correlated Insulator in a NiS_2-xSe_x Solid Solution
K. Iwaya, Y. Kohsaka, S. Satow, T. Hanaguri, S. Miyasaka, and H. Takagi
Physical Review B 70, R161103 (2004).
Charge Dynamics of Ca_2-xNa_xCuO₂Cl₂ as a Correlated Electron System with the Ideal Tetragonal Lattice
K. Waku, T. Katsufuji, Y. Kohsaka, T. Sasagawa, H. Takagi, H. Kishida, H. Okamoto, M. Azuma, and M. Takano
Physical Review B 70, 134501 (2004).
Missing Quasiparticles and the Chemical Potential Puzzle in the Doping Evolution of the Cuprate Superconductors
K. M. Shen, F. Ronning, D. H. Lu, W. S. Lee, N. J. C. Ingle, W. Meevasana, F. Baumberger, A. Damascelli, N. P. Armitage, L. L. Miller, Y. Kohsaka, M. Azuma, M. Takano, H. Takagi, and Z. X. Shen
Physical Review Letters 93, 267002 (2004).
NMR studies on the internal structure of high-T-c, superconductors and other anorganic compounds
K Kumagai, K Kakuyanagi, M Saitoh, Y Matsuda, M Hasegawa, S Takashima, M Nohara, H. Takagi
Hyperfine Interactions 159, 87-93 (2004).
Nodal Quasiparticles and Antinodal Charge Ordering in Ca_2-xNa_xCuO₂Cl₂K. M. Shen, F. Ronning, D. H. Lu, F. Baumberger, N. J. C. Ingle, W. S. Lee, W. Meevasana, Y. Kohsaka, M. Azuma, M. Takano, H. Takagi, and Z. X. Shen
Science 307, 901-904 (2005).
Texture in the Superconducting Order Parameter of CeCoIn₅ Revealed by Nuclear Magnetic Resonance
K. Kakuyanagi, M. Saitoh, K. Kumagai, S. Takashima, M. Nohara, H. Takagi , and Y. Matsuda
Physical Review Letters 94, 47602 (2005).
Magnetic-Field Induced Transition to the 1/2 Magnetization Plateau State in the Geometrically Frustrated Magnet CdCr₂O₄H. Ueda, H. A. Katori, H. Mitamura, T. Goto, and H. Takagi
Physical Review Letters 94, 47202 (2005).
Enhanced Superconducting Transition Temperature in the Water-Intercalated Sulfides
N. Katayama, M. Nohara, F. Sakai, and H. Takagi
Journal of the Physical Society of Japan 74, 851-854 (2005).
Nonequilibrium Quasiparticle Relaxation in the Vortex State of La_2-xSr_xCuO₄G. Bianchi, C. Chen, M. Nohara, H. Takagi, and J. F. Ryan
Physical Review Letters 94, 107004 (2005).
Soft X-ray Photoemission Study of CaB₆A. Sekiyama, T. Sasabayashi, A. Higashiya, H. Fujiwara, S. Imada, K. Taniguchi, H. Takagi, T. Katsufuji, K. Kitazawa, and S. Suga
Journal of Electron Spectroscopy and Related Phenomena 144, 659-661 (2005).
Bulk Electronic State of High-T_c Cuprate La_2-xSr_xCuO₄ Observed by High-Energy Angle Integrated and Resolved Photoemission Spectroscopy
S. Kasai, A. Sekiyama, M. Tsunekawa, P. T. Ernst, A. Shigemoto, A. Yamasaki, A. Irizawa, S. Imada, M. Sing, T. Muro, T. Sasagawa, H. Takagi, and S. Suga
Journal of Electron Spectroscopy and Related Phenomena 144, 507-509 (2005).
Effects of Uniaxial Pressure in Cuprate Ladder Compound
H. Hori, T. Sasagawa, M. Misawa, and H. Takagi
Physica B 359, 1252-1254 (2005).
Uniaxial Pressure Effect in Electron-Doped High-Temperature Superconductor Nd_1.84Ce_0.16CuO₄Y. Kaga, T. Sasagawa, S Takahashi, K. Unosawa, and H. Takagi
Physica B 59, 442-444 (2005).
Control of Stripes/Superconductivity Competition in (La, Eu, Sr)₂CuO₄ Crystals Using Uniaxial Pressure
T. Sasagawa, Suryadijaya, K. Shimatani, and H. Takagi
Physica B 359, 436-438 (2005).
Spectroscopic Evidence for the Low-Temperature Charge-Separated State of [Pd(dmit)₂] Salts
M. Tamura, K. Takenaka, , H. Takagi, S. Sugai, A. Tajima, and R. Kato
Chemical Physics Letters 411, 133-137 (2006).
Angle-Resolved Photoemission Study of K_0.3MoO₃: Direct Observation of Temperature-Dependent Fermi Surface across the Peierls Transition
H. Ando, T. Yokoya, K. Ishizaka, S. Tsuda, T. Kiss, S. Shin, T. Eguchi, M. Nohara, and H. Takagi
Journal of Physics - Condensed Matter 17, 4935-4940 (2005).
Three-Dimensionality of Field-induced Magnetism in a High-Temperature Superconductor
B. Lake, K. Lefmann, N. B. Christensen, G. Aeppli, D. F. McMorrow, H. M. Ronnow, P. Vorderwisch, P. Smeibidl, N. Mangkorntong, T. Sasagawa, M. Nohara, and H. Takagi
Nature Materials 4, 658-662 (2005).
Energy Structure of a Finite Haldane Chain in Y₂BaNi_0.96Mg_0.04O₅ Studied by High Field Electron Spin Resonance
M. Yoshida, K. Shiraki, S. Okubo, H. Ohta, T. Ito, H. Takagi, M. Kaburagi, and Y. Ajiro
Physical Review Letters 95 , 117202 (2005).
Multiple Superconducting Phases in Heavy Fermion Superconductors
Y. Matsuda, K, Izawa, T. Watanabe, Y. Kasahara, Y. Nakajima, T. Sakakibara, C. J. van der Beek, M. Nohara, T. Hanaguri, H. Takagi, J. Goryo, K. Maki, P. Thalmeier, S. Osaki, H. Sugawara, H. Sato, H. Shishido, R. Settai, and Y. Onuki
Physical Review Letters 66, 1365-1369 (2005).
Competing Phases in the Superconducting State of La_2-xSr_xCuO₄: Temperature- and Magnetic-Field-Dependent Quasiparticle Relaxation Measurements
G. Bianchi, C. Chen, M. Nohara, and H. Takagi, and J. F. Ryan
Physical Review B 72, 94516 (2005).
Impurity-induced Transition to a Mott Insulator in Sr₃Ru₂O₇R. Mathieu, A. Asamitsu, Y. Kaneko, J. P. He, X. Z. Yu, R. Kumai, Y, Onose, N. Takeshita, T. Arima, H. Takagi, and T. Tokura
Physical Review B 72, 92404 (2005).
Oxygen Isotope Effect on Electron Dynamics in Bi₂Sr₂CaCu₂O_y: Angle-Resolved Photoemission Spectroscopy
T. Sasagawa, A. Lanzara, G. H. Gweon, S. Zhou, J. Graf, Suryadijaya, and H. Takagi
Physica C 426, 436-440 (2005).
Oxygen Isotope Effect on Charge/Spin Stripes in La_1.8-xEu_0.2Sr_xCuO₄Suryadijaya, T. Sasagawa, and H. Takagi
Physica C 426, 402-406 (2005).
New High Field State of Flux Line Lattice in CeCoIn₅Y. Kasahara, T. Watanabe, K. Izawa, T. Sakakibara, C. J. van der Beek, T. Hanaguri, M. Nohara, H. Takagi, H. Shishido, R. Settai, Y. Onuki, and Y. Matsuda
Physica C 426, 36-40 Part 1 (2005).
Anomalous Pressure Dependence of the Superconducting Transition Temperature of beta-Pyrochlore AOs₂O₆ Oxides
T. Muramatsu, N. Takeshita, C. Terakura, H. Takagi, Y. Tokura, S. Yonezawa, Y. Muraoka, and Z. Hiroi
Physical Review Letters 95, 167004 (2005).
Collapse of Coherent Quasiparticle States in θ-(BEDT-TTF)₂I₃ Observed by Optical Spectroscopy
K. Takenaka, M. Tamura, N. Tajima, and H. Takagi
Physical Review Letters 95, 227801 (2005).
Statics and Dynamics of Incommensurate Spin Order in a Geometrically Frustrated Antiferromagnet CdCr₂O₄J. H. Chung, M. Matsuda, S. H. Lee, K. Kakurai, H. Ueda, T. J. Sato, H. Takagi, K. P. Hong, and S. Park
Physical Review Letters 95, 247204 (2005).
Giant Negative Thermal Expansion in Ge-doped Anti-perovskite Manganese Nitrides
K. Takenaka, and H. Takagi
Applied Physics Letters 87, 261902 (2005).
Doping Dependence of Transport Properties in Fe_1-xCo_xSi
Y. Onose, N. Takeshita, C. Terakura, H. Takagi, and Y. Tokura
Physical Review B 72, 224431 (2005).
Phase-Change Magnetic Memory Effect in Cation-Deficient Iron Sulfide Fe_1-xS
T. Takayama, and H. Takagi
Applied Physics Letters 88, 12512 (2006).
Elastic Scattering Susceptibility of the High Temperature Superconductor Bi₂Sr₂CaCu₂O_8+δ: A Comparison between Real and Momentum Space Photoemission Spectroscopies
K. McElroy, G. H. Gweon, S. Y. Zhou, J. Graf, S. Uchida, H. Eisaki, H. Takagi, T. Sasagawa, D. H. Lee, and A. Lanzara
Physical Review Letters 96, 67005 (2006).
Superconductivity of Doped Ar@C₆₀A. Takeda, Y. Yokoyama, S. Ito, T. Miyazaki, H. Shimotani, K. Yakigaya, T. Kakiuchi, H. Sawa, H. Takagi, K. Kitazawa, and N. Dragoe
Chemical Communications 8, 912-914 (2006).
Correlated Metallic Phase in a Doped Insulator Sr_1-xRh₂O₄Y. Okamoto, M. Nohara, F. Sakai, and H. Takagi
Journal of the Physical Society of Japan 75, 23704 (2006).
Mott-Anderson Transition Controlled by a Magnetic Field in Pyrochlore Molybdate
N. Hanasaki, M. Kinuhara, I. Kezsmarki, S. Iguchi, S. Miyasaka, N. Takeshita, C. Terakura, H. Takagi, and Y. Tokura
Physical Review Letters 96, 116403 (2006).
CaB₃ - A new calcium boride stabilized by thin film epitaxy
H. Yamazaki, and H. Takagi
Journal of Solid State Chemistry 179, 1003-1008 (2006).
Search for Microscopic Evidence for Molecular Level Negative Thermal Expansion in Fullerenes
S. Brown, J. Cao, J. L. Musfeldt, N. Dragoe, F. Cimpoesu, S. Ito, H. Takagi, and R. J. Cross
Physical. Review B 73, 125446 (2006).
Interplay between superconductivity and ferromagnetism in epitaxial Nb(110)/Au(111)/Fe(110) trilayers
H. Yamazaki, N. Shannon, and H. Takagi
Physical Review B 73, 94507 (2006).
Anisotropic s-wave Superconductors Studied by Angle-Resolved Photoemission Spectroscopy
T. Yokoya, T. Baba, S. Tsuda, T. Kiss, A. Chainani, S. Shin, T. Watanabe, M. Nohara, T. Hanaguri, H. Takagi, Y. Takano, H. Kito, J. Itoh, H. Harima, and T. Oguchi
Journal of Physics and Chemistry Solids 67, 277-281 (2006).
Magnetovolume Effect and Negative Thermal Expansion in Mn₃₍Cu_1-xGe_x)N
K. Takenaka, and H. Takagi
Materials Transactions 47, 471-474 (2006).
Chemical Potential Shift in Lightly Doped to Optimally Doped Ca_2-xNa_xCuO₂Cl₂H. Yagi, T. Yoshida, A. Fujimori, Y. Kohsaka, M. Misawa, T. Sasagawa, H. Takagi , M. Azuma, and M. Takano,
Physical Review B 73, 172503 (2006).
High-Pressure Effects on the Superconductivity of beta-Pyrochlore Oxides AOs(2)O(6)
T. Marumatsu, N. Takeshita, C. Terakura, H. Takagi, Y. Tokura, S. Yonezawa, Y, Muraoka, and Z. Hiroi
Physica B 378-380, 882-883 (2006).
Laser-excited ultrahigh-resolution photoemission study of anisotropic s-wave superconductor YNi₂B₂C
T. Baba, T. Yokoya, S. Tsuda, T. Kiss, T. Shimojima, S. Shin, T. Togashi, C. T. Chen, C. Q. Zhang, S, Watanabe, T. Wantanabe, M. Nohara, and H. Takagi
Physica B 378-380, 469-470 (2006).
Microscopic Evidence of the FFLO State in CeCoIn₅ Proved by NMR
K. Kumagai, K. Kakuyanagi, M. Saitoh, S. Takashima, M. Nohara, H. Takagi, and Y. Matsuda
Physica B 378-380, 347-350 (2006).
Low Temperature Metallic State Induced by Electrostatic Carrier Doping of SrTiO₃H. Nakamura, H. Takagi, I. H. Inoue, Y. Takahashi, T. Hasegawa, and Y. Tokura
Applied Physics Letters 89, 133504 (2006).
Laser-excited Ultrahigh-resolution Photoemission Spectroscopy of Borocarbide Superconductor RNi₂B₂C (R = Y and Er)
T. Baba, T. Yokoya, S. Tsuda, T. Kiss, T. Shimojima, S. Shin, T. Togashi, C. T. Chen, C. Q. Zhang, S. Watanabe, T. Watanabe, M. Nohara, and H. Takagi
Physica C 445-448, 46-49 (2006).
Watery Superconductivity in Misfit-layer Sulfides
N. Katayama, M. Nohara, and H. Takagi
Physica C 445-448, 35-38 (2006).
Magnetovolume Effect and Negative Thermal Expansion in Mn₃(Cu_1-xGe_x)N
K. Takenaka, and H. Takagi
Journal of the Japan Institute of Metals, 70, 764-768 (2006).
Fulde-Ferrell-Larkin-Ovchinnikov State in a Perpendicular Field of Quasi-two-dimensional CeCoIn₅K. Kumagai, M. Saitoh, T. Oyaizu, Y. Furukawa, S. Takashima, M. Nohara, H. Takagi, and Y. Matsuda
Physical Review Letters 97, 227002 (2006).
Strong and Complex Electron-Lattice Correlation in Optimally Doped Bi₂Sr₂CaCu₂O_8+δG. H. Gweon, S. Y. Zhou, M. C. Watson, T. Sasagawa, H. Takagi, and A. Lanzara
Physical Review Letters 97, 227001 (2006).
Observation of Higher-Harmonic Helical Spin-Resonance Modes in the Chromium Spinel CdCr₂O₄S. Kimura, M. Hagiwara, H. Ueda, Y. Narumi, K. Kindo, H, Yashiro, T. Kashiwagi, and H. Takagi
Physical Review Letters 97, 257202 (2006).
EXAFS Study of LiV₂O₄ under High Pressure
N. Dragoe, L. Pinsard-Gaudart, J. P. Itie, A. Congeduti, P. Roy, S. Niitaka, H. Takagi, P. Lagarde, and A. M. Flank
High Pressure Research 26, 427-431 (2006).
Microscopic Evidence of the FFLO State in Unconventional Superconductor CeCoIn₅: Study of ¹¹⁵In-NMR
K. Kumagai, K.Kakuyanagi, M. Saitoh, S. Takashima, M. Nohara, H. Takagi, and Y. Matsuda
Journal of Superconductivity and Novel Magnetism 19 1-4 (2006).
Manometer Extension for High Pressure Measurement: Nuclear Quadrupole Resonance Study of Cu₂O with a Modified Bridgman Anvil Cell up to 10 GPa
H. Fukazawa, N. Yamatoji, Y. Kohori, C. Terakura, N. Takeshita, Y. Tokura, and H. Takagi
Review of Scientific Instruments 78, 15106 (2007).
Universal High Energy Anomaly in the Angle-Resolved Photoemission Spectra of High Temperature Superconductors: Possible Evidence of Spinon and Holon Branches
J. Graf, G. H. Gweon, K. McElroy, S. Y. Zhou, C. Jozwiak, E. Rotenberg, A. Bill, T. Sasagawa, H. Eisaki, S. Uchida, H. Takagi, D. H. Lee, and A. Lanzara
Physical Review Letters 98, 67004 (2007).
Enhancement of Superconductivity and Evidence of Structural Instability in Intercalated Graphite CaC₆ under High Pressure
A. Gauzzi, S. Takashima, N. Takeshita, C. Terakura, H. Takagi, N. Emery, C. Harold, and P. Lagrange,
Physical Review Letters 98, 67002 (2007).
An Intrinsic Bond-centered Electronic Glass with Unidirectional Domains in Underdoped Cuprates
Y. Kohsaka, C. Taylor, K. Fujita, A. Schmidt, C. Lupien, T. Hanaguri, M. Azuma, M. Takano, H. Eisaki, H. Takagi, S. Uchida, and J. C. Davis
Science 315, 1380-1385 (2007).
Coppers in the Right Place
H. Takagi
Nature Materials 6, 179-180 (2007).
Angle-Resolved Photoemission Studies of Lattice Polaron Formation in the Cuprate Ca₂CuO₂Cl₂K. M. Shen, F. Ronning, W. Meevasana, D. H. Lu, N. J. C. Ingle, F. Baumberger, W. S. Lee, L. L. Miller, Y. Kohsaka, M. Azuma, M. Takano, H. Takagi, and Z. X. Shen
Physical Review B 75, 75115 (2007).
Absence of Long-Ranged Charge Order in Na_xCa_2-xCuO₂Cl₂ (x = 0.08)
S. Smadici, P. Abbamonte, M. Taguchi, Y. Kohsaka, T. Sasagawa, M. Azuma, M. Takano, and H. Takagi
Physical Review B 75, 75104 (2007).
Characterization of the Schottky Barrier in SrRuO₃/Nb:SrTiO₃ Junctions
Y. Hikita, Y. Kozuka, T. Susaki, H. Takagi, and H. Y. Hwang
Applied Physics Letters 90, 143507 (2007).
Spiral spin structure in the Heisenberg pyrochlore magnet CdCr₂O₄M. Matsuda, M. Takeda, M. Nakamura, K. Kakurai, A. Oosawa, B, E. Lelievre, J. H. Chung, H. Ueda, H. Takagi, and S. H. Lee
Physical Review B 75, 104415 (2007).
Melting of antiferromagnetic ordering in spinel oxide CoAl₂O₄T. Suzuki, H. Nagai, M. Nohara, and H. Takagi
Journal of Physics: Condensed Matter 19, 145265 (2007).
Crystal distortions in geometrically frustrated ACr₂O₄(A = Zn, Cd)
S. H. Lee, G. Gasparovic, C. Broholm, M. Matsuda, J. H. Chung, Y. J. Kim, H. Ueda, G. Xu, P. Zschack, K. Kakurai, H. Takagi, W. Ratcliff, T. H. Kim, and S. W. Cheong
Journal of Physics: Condensed Matter 19, 145259 (2007).
Unusual spectral weight transfer in high temperature superconductors
A. Lanzara, J. Graf, G. H. Gweon, T. Sasagawa, H. Eisaki, H. Takagi, and S. I. Uchida
Journal of Electron Spectroscopy and Related Phenomena 156, XXVIII( 2007).
Robustness of Non-Fermi-Liquid Behavior near the Ferromagnetic Critical Point in Clean ZrZn₂S. Takashima, M. Nohara, H. Ueda, N. Takeshita, C. Terakura, F. Sakai, and H. Takagi
Journal of the Physical Society of Japan 76, 43704 (2007).
Metal-Insulator Transition in a Pyrochlore-type Ruthenium Oxide, Hg₂Ru₂O₇A. Yamamoto, P. Sharma, Y. Okamoto, A. Nakao, H. Katori, S. Niitaka, D. Hashizume, and H. Takagi
Journal of the Physical Society of Japan 76, 43703 (2007).
Comment on “Collapse of coherent quasiparticle states in theta-(BEDT-TTF)₂I₃ observed by optical spectroscopy”– Reply
K. Takenaka, M. Tamura, N. Tajima, H. Takagi, J. Nohara, and S. Sugai
Physical Review Letters 98, 219803 (2007).
Superconductivity of Doped Ar@C₆₀K. Yakigaya, A. Takeda, Y. Yokoyama, S. Ito, T. Miyazaki, T. Suetsuna, H. Shimotani, T. Kakiuchi, H. Sawa, H. Takagi, K. Kitazawa, and N. Dragoe
New Journal of Chemistry 31, 973-979 (2007).
Pressure-Induced Transition from a Correlated Insulator to a Fermi Liquid Observed in Geometrically Frustrated Hg₂Ru₂O₇ Pyrochlore
N. Takeshita, C. Terakura, Y. Tokura, A. Yamamoto, and H. Takagi
Journal of the Physical Society of Japan 76, 63707 (2007).
S=3/2 spin systems on frustrated pyrochlore lattice
H. Ueda, J. Yamaura, H. Mitamura, T. Goto, H. Aruga-Katori, H. Takagi, and Y. Ueda
Journal of Magnetism and Magnetic Materials 310, 1275-1279 (2007).
NMR measurements of the quasi-one-dimensional superconductor β-Na_0.33V₂O₅ under high pressure using a modified Bridgman anvil cell
T. Kozuka, M. Itoh, N. Takeshita, C. Terakura, T. Yamauchi, Y. Ueda, H. Takagi, and Y. Tokura
Journal of Magnetism and Magnetic Materials 310, 1110-1112 (2007).
Magnetic properties of single crystal of cobalt spinel GeCo₂O₄T. Hoshi, H. Aruga-Katori, M. Kosaka, and H. Takagi
Journal of Magnetism and Magnetic Materials 310, e448-e450 (2007).
High-field magnetization study of the heavy fermion oxide LiV₂O₄S. Niitaka, K. Nishikawa, S. Kimura, Y. Narumi, K. Kindo, M. Hagiwara, and H. Takagi
Journal of Magnetism and Magnetic Materials 310, e258-e260 (2007).
NMR study of the novel superconducting state in CeCoIn₅K. Kumagai, K. Kakuyanagi, M. Saitoh, T. Oyaizu, Y. Matsuda, S. Takanashi, M. Nohara, and H. Takagi
Journal of Magnetism and Magnetic Materials 310, 715-717 (2007).
New superconducting phase of CeCoIn₅for H//c-axis at high-field and low temperature region
T. Oyaizu, M. Saitoh, K. Kakuyanagi, Y. Furukawa, K. Kumagai, Y. Matsuda, S. Takashima, M. Nohara, and H. Takagi
Journal of Magnetism and Magnetic Materials 310, 617-619 (2007).
Mesoscopic Phase Coherence in a Quantum Spin Fluid
G. Xu, C. Broholm, Y.-A. Soh, G. Aeppli, J. F. DiTusa, Y. Chen, M. Kenzelmann, C. D. Frost, T. Ito, K. Oka and H. Takagi
Science 317, 1049-1052 (2007).
Resistance switching in the metal deficient-type oxides: NiO and CoO
H. Shima, Y. Tamai, I. Inoue, and H. Takagi
Applied Physics Letters 91, 12901 (2007).
Proximity effects in superconductor/normal-metal/ferromagnet trilayers
H. Yamazaki, N. Shannon, and H. Takagi
Journal of Magnetism and Magnetic Materials 310, 2217-2218 (2007).
Metal-Insulator transition in a pyrochlore-type ruthenium oxide, Hg₂Ru₂O₇ – Erratum
A. Yamamoto, P. A. Sharma, Y. Kamoto, A. Nakao, H. A. Katori, S. Niitaka, D. Hashizume, and H. Takagi
Journal of The Physical Society of Japan 76, 78002 (2007).
Superconductivity in Rh₂Ga₉ and Ir₂Ga₉ without Inversion Symmetry
T. Shibayama, M. Nohara, H. A. Katori, Y. Okamoto, Z. Hiroi, and H. Takagi
Journal of the Physical Society of Japan 76, 73708 (2007).
Pressure-induced structural phase transition in LiV₂O₄L. Pinsard-Gaudart, N. Dragoe, P. Lagarde, A. M. Flank, J. P. Itie, A. Congeduti, P. Roy, S. Niitaka, and H. Takagi
Physical Review B 76, 45119 (2007).
Local Tunneling Spectroscopy across a Metamagnetic Critical Point in the Bilayer Ruthenate Sr₃Ru₂O₇K. Iwaya, S. Satow, T. Hanaguri, N. Shannon, Y. Yoshida, S. I. Ikeda, J. P. He, Y. Kaneko, Y. Tokura, T. Yamada, and H. Takagi
Physical Review Letters 99, 57208 (2007).
Vortex states and magnetic anisotropy in single-crystal La_2-xSr_xCuO₄ studied by torque magnetometry
S. Kohout, T. Schneider, J. Roos, H. Keller, T. Sasagawa, and H. Takagi
Physical Review B 76, 64513 (2007).
Phase Transitions of a Geometrically Frustrated Spin System CdCr₂O₄in Very High Magnetic Fields
H. Mitamura, H. Ueda, H. A. Katori, S. Takeyama, T. Sakakibara, Y. Ueda, and H. Takagi
Journal of the Physical Society of Japan 76, 85001 (2007).
Low-energy spectroscopic mapping studies in optimally-doped Ca_2-xNa_xCuO₂Cl₂T. Hanaguri, Y. Kohsaka, J. C. Seamus Davis, C. Lupien, I. Yamada, M. Azuma, M. Takano, K. Ohishi, and H. Takagi
Physica C-Superconductivity and its applications 460, 954-955 (2007).
Charge-order-maximized momentum-dependent superconductivity
T. Kiss, T. Yokoya, A. Chainani, S. Shin, T. Hanaguri, M. Nohara, and H. Takagi
Nature Physics 3, 720-725 (2007).
NMR study of a texture structure in the superconducting order parameter of CeCoIn₅K. Kumagai, K. Kakuyanagi, M. Saitoh, T. Oyaizu, Y. Furukawa, Y. Matsuda, S. Takashima, M. Nohara, and H. Takagi
Physica C-Superconductivity and its applications 460, 653-654 (2007).
Correlation-Driven Heavy-Fermion Formation in LiV₂O₄P. E. Jonsson, K. Takenaka, S. Niitaka, T. Sasagawa, S. Sugai, and H. Takagi
Physical Review Letters 99, 167402 (2007).
The influence of static-stripes on superfluid density in La_1.84-yEu_ySr_0.16CuO₄S. Pyon, T. Sasagawa, and H. Takagi
Physica C 463-465, 60-63 (2007).
Is there 1/8-anomaly of Tc in Ca_2-xNa_xCuO₂Cl₂ with a checkerboard-type charge ordering?
D. Hirai, T. Sasagawa, and H. Takagi
Physica C 463-465, 56-59 (2007).
Spin-Liquid State in S=1/2 Hyper-Kagome Antiferromagnet Na₄Ir₃O₈Y. Okamoto, M. Nohara, H. Aruga-Katori, and H. Takagi
Physical Review Letters 99, 137207 (2007).
Lanthanide substitution effects in electron-doped High-T-c superconductors studied by angle-resolved photoemission spectroscopy
M. Ikeda, T. Yoshida, A. Fujimori, M. Kubota, K. Ono, K. Unozawa, T. Sasagawa, and H. Takagi
Journal of Superconductivity and Novel Magnetism 20, 563-565 (2007).
Quasiparticle interference and superconducting gap in Ca_2-xNa_xCuO₂Cl₂T. Hanaguri, Y. Kohsaka, J. C. Davis, C. Lupien, I Yamada, M. Azuma, M. Takano, K. Ohishi, M. Ono, and H. Takagi
Nature Physics 3, 865 - 871 (2007).
Negative thermal expansion in Ge-free antiperovskite manganese nitrides: Tin-doping effect
K. Takenaka, K. Asano, M. Misawa, and H. Takagi
Applied Physics Letters 92, 11927 (2008).
Bulk Electronic Structure of the Antiferromagnetic Superconducting Phase in ErNi₂B₂C
T. Baba, T. Yokoya, S. Tsuda, T. Kiss, T. Shimojima, K. Ishizaka, H. Takeya, K. Hirata, T. Watanabe, M. Nohara, H. Takagi, N. Nakai, K. Machida, T. Togashi, S. Watanabe, X.-Y. Wang, C. T. Chen, and S. Shin
Physical Review Letters 100, 17003 (2008).
Control of resistance switching voltages in rectifying Pt/TiO_x/Pt trilayer
H. Shima, F. Takano，H. Muramatsu，H. Akinaga，I. H. Inoue, and H. Takagi
Applied Physics Letters 92, 43510 (2008).
Nonpolar resistance switching of metal/binary-transition-metal oxides/metal s andwiches: Homogeneous/inhomogeneous transition of current distribution
I. H. Inoue, S.Yasuda, H. Akinaga, and H. Takagi
Physical Review B 77, 35105 (2008).
Magnetovolume effect in Mn₃Cu_1-xGe_xN related to the magnetic structure: Neutron powder diffraction measurements
S. Iikubo. K. Kodama, K. Takenaka, H. Takagi, and S. Shamoto
Physical Review B 77, 20409 (2008).
Frustrated minority spins in GeNi₂O₄M. Matsuda, J.-H, Chung, S. Park, T. J. Sato, K. Matsuno, H. Aruga. Katori, H. Takagi, K. Kakurai, K. Kamazawa, Y. Tsunoda, I. Kagomiya, C. L. Henley, and S.-H. Lee
A Letters Journal Exploring The Frontiers of Physics, 82-37006 (2008).
On the synthesis conditions of n and N₂ endohedral fullerenes
S. Ito, H. Shimotani, H. Takagi, and N. Dragoe
Fullerenes Nanotubes and Carbon Nanostructures 16, 206-213 (2008).
Study of optical response of spinel oxide by utilizing IR-THz spectromicroscopy
K. Shimai, A. Irizawa, K. Sato, K. Iizuka, M. Nishiyama, T. Nanba, S. Niitaka, and H. Takagi
Infrared Physics & Technology 51, 468-469 (2008).
Negative differential resistance induced by Mn substitution at SrRuO₃/Nb:SrTiO₃ Schottky interfaces
Y. Hikita, L. F. Kourkoutis, T. Susaki. D. A. Muller, H. Takagi, and H. Y. Hwang
Physical. Review B 77, 205330 (2008).
X-ray absorption and x-ray magnetic dichroism study on Ca₃CoRhO₆ and Ca₃FeRhO₆T. Burnus, Z. Hu, Hua Wu, J. C. Cezar, S. Niitaka, H. Takagi, C. F. Chang, N. B. Brookes, H.-J. Lin, L. Y. Jang, A. Tanaka, K. S. Liang, C. T. Chen, and L. H. Tjeng
Physical Review B 77, 205111 (2008).
Fermi-liquid behavior and weakly anisotropic superconductivity in the electron-doped cuprate Sr_1-xLa_xCuO₂K. H. Satoh, S. Takeshita, A. Koda, R. Kadono, K. Ishida, S. Pyon, T. Sasagawa, and H. Takagi
Physical. Review B 77, 224503 (2008).
Violation of the isotropic mean free path approximation for overdoped La_2-xSr_xCuO₄A. Narduzzo, G. Albert, M. M. J. French, N. Mangkorntong, M. Nohara, H. Takagi, and N. E. Hussey
Physical Review B 77, 220502 (2008).
Crystal-Field Level Inversion in Lightly Mn-Doped Sr₃Ru₂O₇M. A. Hossain, Z. Hu, M. W. Haverkort, T. Burnus, C. F. Chang, S. Klein, J. D. Denlinger, H. -J. Lin, C. T. Chen, R. Mathieu, Y. Kaneko. Y. Tokura, S. Satow, Y. Yoshida, H. Takagi, A. Tanaka, I. S. Elfimov, G. A. Sawatzky, L. H. Tjeng, and A. Damascelli
Physical Review Letters 101, 16404 (2008).
Band Jahn-Teller Instability and Formation of Valence Bond Solid in a Mixed-Valent Spinel Oxide LiRh₂O₄Y. Okamoto, S. Niitaka, M. Uchida, T. Waki, M. Takigawa, Y. Nakatsu, A. Sekiyama, S. Suga, R. Arita, and H. Takagi
Physical Review Letters 101, 86404 (2008).
X-ray imaging of dispersive charge modes in a doped Mott insulator near the antiferromagnet/superconductor transition
Y. W. Li, D. Qian, L. Wray, D. Hsieh, Y. Xia, Y. Kaga, T. Sasagawa, H. Takagi, R. S. Markiewicz, A. Bansil, H. Eisaki, S. Uchida, and M. Z. Hasan
Physical Review B 78, 073104 (2008).
Voltage polarity dependent low-power and high-speed resistance switching in CoO resistance random access memory with Ta electrode
H. Shima, F Takano, H. Muramatsu, H. Akinaga, Y. Tamai,I. H. Inoue, and H. Takagi
Applied Physics Letters 93, 113504 (2008).
Marginal breakdown of the Fermi-liquid state on the border of metallic ferromagnetism
R. P. Smith, M. Sutherland, G. G. Lonzarich, S. S. Saxena, N. Kimura, S. Takashima, M. Nohara, and H. Takagi
Nature 455, 1220-1223 (2008).
Resistance Switching and Formation of a Conductive Bridge in Metal/Binary Oxide/Metal Structure for Memory Devices
K. Fujiwara, T. Nemoto, M. J. Rozenberg, Y. Nakamura, and H. Takagi
Japanese Journal of Applied Physics 47, 6266-6271 (2008).
Local Lattice Distortion in the Giant Negative Thermal Expansion Material Mn₃Cu_1-xGe_xN
S. Iikubo, K. Kodama, K. Takenaka, H. Takagi, M. Takigawa, and S. Shamoto
Physical Review Letters 101, 205901 (2008).
⁷Li- and ⁵¹V-NMR study of LiVS₂T. Tanaka, Y. Kawasaki, Y. Takagishi, Y. Ideta, Y. Kishimoto, T. Ohno, N. Katayama, M. Nohara and H. Takagi
Journal of Physics and Chemistry of Solids 69, 3142-3145 (2008).
Local Lattice Distortion and Photo-Induced Phase Transition in Transition-Metal Compounds with Orbital Degeneracy
T. Mizokawa, K. Takubo, T. Sudayama, Y. Wakisaka, N. Takubo, K. Miyano, N. Matsumoto, S. Nagata, T. Katayama, M. Nohara, H. Takagi, M. Ikeda, N. Kojima, M. Arita, H. Namatame, and M. Taniguchi
Journal of Superconductivity and Novel Magnetism 22, 67-70 (2009).
Complex oxides: A tale of two enemies
H. Takagi
Nature Materials 8, 251-252 (2009).
Anomalous Criticality in the Electrical Resistivity of La_2-xSr_xCuO₄R. A. Cooper, Y. Wang, B. Vignolle, J. Lipscombe, S. M. Hayden, Y. Tanabe, T. Adachi, Y. Koike, M. Nohara, H. Takagi, C. Proust, N. E. Hussey
Science 323, 603-607 (2009).
Coherence Factors in a High-Tc Cuprate Probed by Quasi-particle Scattering off Vortices
T. Hanaguri, Y. Kohsaka, M. Ono, M. Maltseva, P. Coleman, I. Yamada, M. Azuma, M. Takano, K. Ohishi, and H. Takagi
Science 323, 923-926 (2009).
Superconductivity in layered pnictides BaRh₂P₂and BaIr₂P₂D. Hirai, T. Takayama, R. Higashinaka, H. Aruga-Katori and H. Takagi
Journal of the Physical Society of Japan 78, 23706 (2009).
Phase-sensitive observation of a spin-orbital Mott state in Sr₂IrO₄B. J. Kim, H. Ohsumi, T. Komesu, S. Sakai, T. Morita, H. Takagi, and T. Arima
Science 323, 1329-1332 (2009).
High-pressure ⁵¹V NMR study of the magnetic phase diagram and metal-insulator transition in quasi-one-dimensional beta-Na_0.33V₂O₅T. Suzuki, I. Yamauchi, Y. Shimizu, M. Itoh, N. Takeshita, C. Terakura, H. Takagi, Y. Tokura, T. Yamauchi, and Y. Ueda
Physical Review B 79, 81101 (2009).
Zero thermal expansion in a pure-form antiperovskite manganese nitride
K. Takenaka and H. Takagi
Applied Physics Letters 94, 131904 (2009).
Enhancement of the Nernst effect by stripe order in a high-T_c superconductor
O. Cyr-Choiniere, R. Daou, F. Laliberte, D. LeBoeuf, N. Doiron-Leyraud, J. Chang, J.-Q. Yan, J.-G. Cheng, J.-S, Zhou, J. B. Goodenough, S. Pyon, T. Takayama, H. Takagi, Y. Tanaka, and L. Taillefer
Nature 458, 743-745 (2009).
Emergence of a Diffusive Metal State with No Magnetic Order near the Mott Transition in Frustrated Pyrochlore-Type Molybdates
S. Iguchi , N. Hanasaki , M. Kinuhara , N. Takeshita, C. Terakura, Y. Taguchi, H. Takagi, and Y. Tokura,
Physical Review Letters 102, 136407 (2009).
Local structure anomaly around Ge dopants in Mn₃Cu_0.7Ge_0.3N with negative thermal expansion
J. Matsuno, K. Takenaka, H. Takagi, D. Matsumura, Y. Nishihata, and J. Mizuki
Applied Physics Letters 94, 181904 (2009).
Trimer V³⁺ Spin Singlet State and Pseudo Gap in LiVS₂Studied by ⁵¹V and ⁷ Li Nuclear Magnetic Resonance
T. Tanaka , Y. Kawasaki, S. Endou, S. Kimura, Y. Ideta, Y. Kishimoto, T. Ohno, N. Katayama, M. Nohara, and H. Takagi
Journal of the Physical Society of Japan 78, 54709 (2009).
Evidence for Fermi Surface Reconstruction in the Static Stripe phase of La_1.8-xEu_0.2Sr_xCuO₄, x = 1/8
V. B. Zabolotnyy, A. A. Kordyuk, D. S. Inosov, D. V. Evtushinsky, R. Schuster, B. Buechner, N. Wizent, G. Behr, S. Pyon, T. Takayama, H. Takagi, R. Follath, and S. V. Borisenko
Europhysics Letters 86, 47005 (2009).
Inhomogeneous Chemical States in Resistance-Switching Devices with a Planar-type Pt/CuO/Pt Structure
R. Yasuhara, K. Fujiwara, K. Horiba, H. Kumigashira, M. Kotsugi, M. Oshima, and H. Takagi
Applied Physics Letters 95, 12110 (2009).
Do All Nuclei Recoil on Photoemission in Compounds?
S. Suga, A. Sekiyama, H. Fujiwara, Y. Nakatsu, T. Miyauchi, S. Imada, P. Balzer, S. Niitaka, H. Takagi, K. Yoshimura, M. Yabashi, K. Tamasaku, A. Higashiya, and T. Ishikawa
New Journal of Physics 11, 73025 (2009).
Drastic and Sharp Change in Color, Shape, and Magnetism in Transition of CuMoO₄ Single Crystals
T. Ito, H. Takagi, and T. Asano
Chemistry of Materials 21, 3376-3379 (2009).
Charge-transfer Excitonsin Under-doped Ca_2-xNa_xCuO₂Cl₂Studied by Electron Energy-Loss Spectroscopy
R. Schuster, S. Pyon, M. Knupfer, J. Fink, M. Azuma, M. Takano, H. Takagi, and B. Buechner
Physical Review B 79, 214517 (2009).
Excitonic Insulator State in Ta₂NiSe₅ Probed by Photoemission Spectroscopy
Y. Wakisaka, T. Sudayama, K. Takubo, T. Mizokawa, M. Arita, H. Namatame, M. Taniguchi, N. Katayama, M. Nohara, and H. Takagi
Physical Review Letters 103, 26402 (2009).
Effects of chemical pressure on the Fermi surface and band dispersion of the electron-doped high-T_c superconductors
M. Ikeda, T. Yoshida, A. Fujimori, M. Kubota, K. Ono, H, Das, T. Saha-Dasgupta, K. Unozawa, Y. Kaga, T. Sasagawa, and H. Takagi
Physical Review B 80, 14510 (2009).
Electrode-Geometry Control of the Formation of a Conductive Bridge in Oxide Resistance Switching Devices
K. Fujiwara, T. Yajima, Y. Nakamura, M. J. Rozenberg, and H. Takagi
Applied Physics Express 2, 81401 (2009).
Tuning of Metal–Insulator Transition of Quasi-Two-Dimensional Electrons at Parylene/SrTiO₃Interface by Electric Field
H. Nakamura, H. Tomita, H. Akimoto, R. Matsumura, I. H. Inoue, T. Hasegawa, K. Kono, Y. Tokura, and H. Takagi
Journal of the Physical Society of Japan 78 ,83713 (2009).
Evidence for Oxygen holes due to d-p rehybridization in thermoelectric Sr_1-xRh₂O₄Y. Ishida, T. Baba, R. Eguchi, M. Matsunami, M. Taguchi, A. Chainani, Y. Senba, H. Ohashi, Y. Okamoto, H. Takagi, and S. Shin
Physical Review B 80, 81103(1-4) (2009).
Conversion of magnetic structure by slight dopants in geometrically frustrated antipervskite Mn₃GaN
K. Takenaka, T. Inagaki, and H. Takagi
Applied Physics Letters 95, 13, 132508 (2009).
Anomalous Metallic State in the Vicinity of Metal to Valence-Bond Solid Insulator Transition
in LiVS₂N. Katayama, M. Uchida, D. Hashizume, S. Niitaka, J. Matsuno, D. Matsumura, Y. Nishihata, J. Mizuki,N. Takeshita, A. Gauzzi, M. Nohara, and H. Takagi
Physical Review Letters 103, 146405 (2009).
Antiferromagnetic Fluctuations in Fe(Se_1-xTe_x)_0.92 (x＝0:75,1) Observed by Inelastic Neutron Scattering
S. Iikubo, M. Fujita, S. Niitaka, and H. Takagi
Journal of the Physical Society of Japan 78, 103704 (2009).
Mechanical Properties of Metallic Perovskite Mn₃Cu_0.5Ge_0.5N: High-Stiffness Isotropic Negative Thermal Expansion Material
Y. Nakamura, K. Takenaka, A. Kishimoto, and H. Takagi
Journal of the American Ceramic Society 92, 2999-3003 (2009).
Differences in the high-energy kink between hole- and electron-doped high-Tc superconductors
M. Ikeda, T. Yoshida, A. Fujimori, M. Kubota, K. Ono, Y. Kaga, T. Sasagawa, and H. Takagi
Physical Review B 80, 184506 (2009).
Pressure-Induced Antiferromagnetic Fluctuations in the Pnictide Superconductor FeSe_0.5Te_0.5: ¹²⁵Te NMR Study
Y. Shimizu, T. Yamada, T. Takami, S. Niitaka, H. Takagi, and M. Itoh
Journal of the Physical Society of Japan 78, 123709 (2009).
Frustrated Magnetism and Cooperative Phase Transitions in Spinels
S.-H. Lee, H. Takagi, D. Louca, M. Matsuda, J.Sungdae, H. Ueda, Y. Ueda, T. Katsufuji, J.-H. Chung, S. Park, S.-W. Cheong, and C. Broholm
Journal of the Physical Society of Japan, 79, 11004 (2010).
Nernst and Seebeck Coefficients of the Cuprate Superconductor YBa₂Cu₃O_6.67: A Study of Fermi Surface Reconstruction
J. Chang, R. Daou, C. Proust, D. LeBoeuf, N. D. Leyraud, F. Laliberte, B. Pingault, B. J. Ramshaw, R. Liang, D. A. Bonn, W. N. Hardy, H. Takagi, A. B. Antunes, I. Sheikin, K. Behnia, and L. Taillefer
Physical Review Letters 104, 57005 (2010).
On the possibility of MgB₂-like superconductivity in potassium hexaboride
Y. Katsura, A. Yamamoto, H. Ogino, S. Horii, J. Shimoyama, K. Kishio, and H. Takagi
Physica C 470, 5633-5634 (2010).
Photoelectron Spectroscopy of LiV₂O₄ with Photons from 8.4 to 8100 eV: Bulk Sensitivity, Hybridization, and Recoil Effects
S. Suga, A. Sekiyama, H. Fujiware, Y. Nakatsu, J. Yamaguchi, M. Kimura, K. Murakami, S. Niitaka, H. Takagi, M. Yabashi, K. Tamasaku, A. Higashiya, T. Ishikawa, and I. Nekrasov
Journal of the Physical Society of Japan 79, 44711 (2010).
Unconventional s-Wave Superconductivity in Fe(Se,Te)
T. Hanaguri, S. Niitaka, K. Kuroki, and H. Takagi
Science 23, 328, 5977, 474-476 (2010).
High Field Magnetism of the Spinel Oxide CoAl₂O₄M. Hagiwara, S. Kimura, N. Nishihagi, T. Suzuki, M. Nohara, H. Takagi, and K. Kindo
Journal of Low Temperature Physics 159, 11-14 (2010).
Anomalous State Sandwiched between Fermi Liquid and Charge Ordered Mott-InsulatingPhases of Ti₄O₇M. Taguchi, A. Chainani, M. Matsunami, R. Eguchi, Y. Takata, M. Yabashi, K. Tamasaku, Y. Nishino, T. Ishikawa, S. Tsuda, S. Watanabe, C. T. Chen, Y. Senba, H. Ohashi, K. Fujiwara, Y. Nakamura, H. Takagi, and S. Shin
Physical Review Letters 104, 106401 (2010).
An Emergent Change of Phase for Electronics
H. Takagi and H. Y. Hwang
Science 327, 1601-1602 (2010).
Interplay between superconductivity and ferromagnetism in epitaxial Nb(110)/Au(111)/Co(0001) trilayers
H. Yamazaki, N. Shannon, and H. Takagi
Physical Review B 81, 94503 (2010).
V-V dimerization effects on bulk-sensitive hard x-ray photoemission spectra for Magneacuteli phase vanadium oxides
M. Obara, A. Sekiyama, S. Imada, J. Yamaguchi, T. Miyamachi, T. Balashov, W. Wulfhekel, M. Yabashi, K. Tamasaku, A. Higashiya, T. Ishikawa, K. Fujiwara, H. Takagi, and S. Suga
Physical Review B 81, 113107 (2010).
Direct imaging of lithium atoms in LiV₂O₄ by spherical aberration-corrected electron microscopy
Y. Oshima, H. Sawada, F. Hosokawa, E. Okunishi, T. Kaneyama, Y. Kondo, S. Niitaka, H. Takagi, Y. Tanishiro, and K. Takayanagi
Journal of Electron Microscopy 59, 457-461(2010).
Epitaxially stabilized iridium spinel oxide without cations in the tetrahedral site
H. Kuriyama, J. Matsuno, S. Niitaka, M. Uchida, D. Hashizume, A. Nakao, A. K. Sugimoto, H. Ohsumi, M. Takata, and H. Takagi
Applied Physics Letters 96, 182103 (2010).
Gradual development of Γ^5gantiferromagnetic moment in the giant negative thermal expansion material Mn₃Cu_1-xGe_xN (x ~ 0.5)
K. Kodama, S. Iikubo, K. Takenaka, M. Takigawa, H. Takagi, and S. Shamoto
Physical Review B 81, 224419 (2010).
Evidence for a Correlated Insulator to Antiferromagnetic Metal Transition in CrN
P. A. Bhobe, A. Chainani, M. Taguchi, T. Takeuchi, R. Eguchi, M. Matsunami, K. Ishizaka,Y. Takata, M. Oura, Y. Senba, H. Ohashi, Y. Nishino, M. Yabashi, K. Tamasaku, T. Ishikawa, K. Takenaka, H. Takagi, and S. Shin
Physical Review Letters 104, 236404 (2010).
Angle-resolved photoemission observation of the superconducting-gap minimum and its relation to the nesting vector in the phonon-mediated superconductor YNi₂B₂C
T. Baba, T. Yokoya, S. Tsuda, T. Watanabe, M. Nohara, H. Takagi, T. Oguchi, and S. Shin
Physical Review B 81, 180509 (2010).
Spatial Redistribution of Oxygen Ions in Oxide Resistance Switching Device after Forming Process
T. Yajima, K. Fujiwara, A. Nakao, T. Kobayashi, T. Tanaka, K. Sunouchi, Y.Suzuki, M. Takeda, K. Kojima, Y. Nakamura, K. Taniguchi, and H. Takagi
Japanese Journal of Applied Physics 49, 060215 (2010).
Evidence for dominant Pauli paramagnetic effect in the upper critical field of single-crystalline FeTe_0.6Se_0.4S. Khim, J.-W. Kim, E.-S. Choi, Y. Bang, M. Nohara, H. Takagi, and K. H. Kim
Physical Review B 81, 184511 (2010).
Momentum-resolved Landau-level spectroscopy of Dirac surface state in Bi₂Se₃T. Hanaguri, K. Igarashi, M. Kawamura, H. Takagi, and T. Sasagawa
Physical Review B 82, 081305 (2010).
Absence of nesting in the charge-density-wave system 1T-VS2 as seen by photoelectron spectroscopy
M. Murazzi, A. Chainani, N. Katayama, R. Eguchi, M. Matsunani, H. Ohashi, Y. Senba, M. Nohara, M. Uchida, H. Takagi, and S. Shin
Physical Review B 82, 075130 (2010).
Ten layered hexagonal perovskite Sr₅Ru_5-xO₁₅ (x = 0.90), a weak ferromagnet with a giant coercive field H_c ~ 12 T
A. Yamamoto, D. Hashizume, H. A. Katori, T. Sasaki, E. Ohmichi, T. Nishizaki, N. Kobayashi, and H. Takagi
Chemistry of Materials 22, 5712-5717 (2010).
Magnetic ground state of pyrochlore oxides close to metal-insulator boundary robed by muon spin rotation
M. Miyazaki, R. Kadono, K. H. Satoh, M. Hiraishi, S. Takeshita, A. Koda, A. Yamamoto, and H. Takagi
Physical Review B 82, 94413 (2010).
Magnetic-field-induced phase transition of coupled edge spins in the Haldane gap system Y₂BaNi_1−yMg_yO₅T. Ito and H. Takagi
Physical Review B 82, 100407 (2010).
Superconductivity in 4d and 5d transition metal layered pnictides BaRh₂P₂, BaIr₂P₂and SrIr₂As₂D. Hirai, T. Takayama, D. Hashizume, R. Higashinakac, A. Yamamoto , H. A.Katori, and H. Takagi
Physica C 470, S296-S297 (2010).
Strong 3 p-T_1u hybridization in Ar@C₆₀M. Morscher, A. P. Seitsonen, S. Ito, H. Takagi, N. Dragoe, and T. Greber
Physical Review A 82, 051201 (2010).
Superconducting Phase at 7.7 K in the Hg_xReO₃Compound with a Hexagonal Bronze Structure
K. Ohgushi, A. Yamamoto, Y. Kiuchi, C. Ganguli, K. Matsubayashi, Y. Uwatoko, and H. Takagi
Physical Review Letters 106, 017001 (2011).
Phonon, two-magnon, and electronic Raman scattering of Fe_1+yTe_1-xSe_xK. Okazaki, S. Sugai, S. Niitaka, and H. Takagi
Physical Review B 83, 035103 (2011).
Light-Induced Superconductivity in a Stripe-Ordered Cuprate
D. Fausti, R. I. Tobey, N. Dean, S. Kaiser, A. Dienst, M. C. Hoffmann, S. Pyon, T. Takayama, H. Takagi, and A. Cavalleri
Science 331, 189-191 (2011).
Femtosecond core-level photoemission spectroscopy on 1T-TaS₂using a 60-eV laser source
K. Ishizaka, T. Kiss, T. Yamamoto, Y. Ishida, T. Saitoh, M. Matsunami, R. Eguchi1, T. Ohtsuki, A. Kosuge, T. Kanai, M. Nohara, H. Takagi, S. Watanabe, and S. Shin
Physical Review B 83, 081104 (2011).
Metal–Insulator Transition and Magnetic Order in the Pyrochlore Oxide Hg₂Ru₂O₇M. Yoshida, M. Takigawa, A. Yamamoto, and H. Takagi
Journal of the Physical Society of Japan 80, 034705 (2011).
Magnetic-Field-Induced Transitions in Spinel GeCo₂O₄M. Matsuda, T. Hoshi, H. A. Katori, M. Kosaka, and H. Takagi
Journal of the Physical Society of Japan 80, 034708 (2011).
Hard x-ray photoelectron spectroscopy of the metal-insulator transition in LiRh₂O₄Y. Nakatsu, A. Sekiyama, S. Imada, Y. Okamoto, S. Niitaka, H. Takagi, A. Higashiya, M. Yabashi, K. Tamasaku, T. Ishikawa, and S. Suga
Physical Review B 83, 115120 (2011).
Momentum-resolved electronic excitations in the Mott insulator Sr₂IrO₄ studied by resonant inelastic x-ray scattering
K. Ishii, I. Jarrige, M. Yoshida, K. Ikeuchi, J. Mizuki, K. Ohashi, T. Takayama, J. Matsuno, and H. Takagi
Physical Review B 83, 115121 (2011).
Vibrational properties of noble gas endohedral fullerenes
F. Cimpoesu, S. Ito, H. Shimotani, H. Takagi, and N. Dragoe
Physical Chemistry Chemical Physics 13, 9609-9615 (2011).
Counting lithium ions in the diffusion channel of an LiV₂O₄crystal
S. Lee, Y. Oshima, H. Sawada, F. Hosokawa, E. Okunishi, T. Kaneyama, Y. Kondo, S. Niitaka, H. Takagi, Y. Tanishiro, and K. Takayanagi
Journal of Applied Physics 109, 113530 (2011).
Highly Frustrated Magnetism in Spinels
H. Takagi and S. Niitaka
in: Introduction to Frustrated Magnetism: Materials , Experiments, Theory, Eds.: C. Lacroix, P. Mendels, F. Mila, Springer Series in Solid-State Sciences 164, 155-175 (2011), Springer Verlag, Berlin.
Bi-directional ultrafast electric-field gating of interlayer charge transport in a cuprate superconductor
A. Dienst, M. C. Hoffmann, D. Fausti, J. C. Petersen, S. Pyon, T. Takayama, H. Takagi, and A. Cavalleri
Nature Photonics 5, 485-488 (2011).
Fermi-surface reconstruction by stripe order in cuprate superconductors
F. Laliberté, J. Chang, N. Doiron-Leyraud, E. Hassinger, R. Daou, M. Rondeau, B. J. Ramshaw, R. Liang, D. A. Bonn, W. N. Hardy, S. Pyon, T. Takayama, H. Takagi, I. Sheikin, L. Malone, C. Proust, K. Behnia, and L. Taillefer
Nature Communications 2, 432 (2011).
Molecular thermal contraction of the Ar@C₆₀ endohedral fullerene
N. Dragoe, A. M. Flank, P. Lagarde, S. Ito, H. Shimotani, and H. Takagi
Physical Review B 84, 155448 (2011).
Quasi-One-Dimensional Spin Dynamics in LiV₂O₄: One-to-Three-Dimensional Crossover as a Possible Origin of Heavy Fermion State
R. Kadono, A. Koda, W. Higemoto, K. Ohishi, H. Ueda, C. Urano, S. Kondo, M. Nohara, and H. Takagi
Journal of the Physical Society of Japan 81, 014709 (2011).
Transport and thermodynamic evidence for a marginal Fermi-liquid state in ZrZn₂M. Sutherland, R. P. Smith, N. Marcano, Y. Zou, S. E. Rowley, F. M. Grosche, N. Kimura, S. M. Hayden, S. Takashima, M. Nohara, and H. Takagi
Physical Review B 85, 035118 (2012).
In-situ Annular Bright-Field Imaging of Structural Transformation of Spinel LiV₂O₄Crystals into Defective Li_xV₂O₄S. Lee, Y. Oshima, S. Niitaka, H. Takagi, Y. Tanishiro, and K. Takayanagi
Japanese Journal of Applied Physics 51, 020202 (2012).
Enhancement of the Jahn-Teller distortion by magnetization in manganites
Y. Y. Chu, H. H. Wu, S. C. Liu, H.-H. Lin, J. Matsuno, H. Takagi, J. H. Huang, J. van den Brink, C. T. Chen, and D. J. Huang
Applied Physics Letters 100, 112406 (2012).
Photoemission Spectroscopy of Ta₂NiSe₅Y. Wakisaka, T. Sudayama, K. Takubo, T. Mizokawa, N. L. Saini, M. Arita, H. Namatame, M. Taniguchi, N. Katayama, M. Nohara, and H. Takagi
Journal of Superconductivity and Novel Magnetism 25, 1231-1234 (2012).
Metal-Insulator transition and superconductivity in the binary pnictides RuPn (Pn=P, As, Sb)
D. Hirai, T. Takayama, D. Hashizume and H.Takagi
Physical Review B 85, 140509 (2012).
Visualization of the emergence of the pseudogap state and the evolution to superconductivity in a lightly hole-doped Mott insulator
Y. Kohsaka, T. Hanaguri, M. Azuma, M. Takano, J. C. Davis, and H. Takagi
Nature Physics 8, 534 (2012).
Crossover from coherent to incoherent scattering in spin-orbit dominated Sr₂IrO₄M. Fatih Cetin, P. Lemmens, V. Gnezdilov, D. Wulferding, D. Menzel, T. Takayama, K. Ohashi, and H. Takagi
Physical Review B 85, 195148 (2012).
Scanning tunneling microscopy/spectroscopy of vortices in LiFeAs
T. Hanaguri, K. Kitagawa, K. Matsubayashi, Y. Mazaki, Y. Uwatoko, and H. Takagi
Physical Review B 85, 214505 (2012).
Strong Coupling Superconductivity at 8.4 K in an Antiperovskite Phosphide SrPt₃P
T. Takayama, K. Kuwano, D. Hirai, Y. Katsura, A. Yamamoto, and H. Takagi
Physical Review Letters 108, 237001 (2012).
Two-Dimensional Heisenberg Behavior of J_eff= 1/2 Isospins in the Paramagnetic State of the Spin-Orbital Mott Insulator Sr₂IrO₄S. Fujiyama, H. Ohsumi, T. Komesu, J. Matsuno, B. J. Kim, M. Takata, T. Arima, and H. Takagi
Physical Review Letters 108, 247212 (2012).
Electric-Field-Induced Superconductivity at 9.4 K in a layered transition metal disulphide MoS₂K. Taniguchi, A. Matsumoto, H. Shimotani, and H. Takagi
Applied Physics Letters 101, 042603 (2012).
An orbital-selective spin liquid in a frustrated heavy fermion spinel LiV₂O₄Y. Shimizu, H. Takeda. M. Tanaka, M. Itoh, S. Niitaka, and H. Takagi
Nature Communications 3, 981 (2012).
Decrease of upper critical field with underdoping in cuprate superconductors
J. Chang, N. D-Leyraud, O. C-Choinière, G. Grissonnanche, F. Laliberté, E. Hassinger, J.-Ph. Reid, R. Daou, S. Pyon, T. Takayama, H. Takagi, and L. Taillefer
Nature Physics 8,751-756 (2012).
Weak antiferromagnetism of Jeff=1/2 band in bilayer iridate Sr₃Ir₂O₇S. Fujiyama, K. Ohashi, H. Ohsumi, K. Sugimoto, T. Takayama, T. Komesu, M. Takata, T. Arima, and H. Takagi
Physical Review B 86, 174414 (2012).
Evidence for a cos(4φ) Modulation of the Superconducting Energy Gap of Optimally Doped FeTe_0:6Se_0.4 Single Crystals Using Laser Angle-Resolved Photoemission Spectroscopy
K. Okazaki, Y. Ito, Y. Ota, Y. Kotani, T. Shimojima, T. Kiss, S. Watanabe, C.-T. Chen, S. Niitaka, T. Hanaguri, H. Takagi, A. Chainani, and S. Shin
Physical Review Letters 109, 237011 (2012).
Angle-dependent spectral weight transfer and evidence of a symmetry-broken in-plane charge response in Ca_1.9Na_0.1CuO₂Cl₂R. Schuster, S. Pyon, M. Knupfer, M. Azuma, M. Takano, H. Takagi, and B. Büchner
Physical Review B 86, 245112 (2012).
Quantifying covalency and metallicity in correlated compounds undergoing metal-insulator transitions
A. Chainani, A. Yamamoto, M. Matsunami, R. Eguchi, M. Taguchi, Y. Takata, H. Takagi, S. Shin, Y. Nishino, M. Yabashi, K. Tamasaku, and T. Ishikawa
Physical Review B 87, 045108 (2013).
Orbital reformation with vanadium trimerization in d²triangular lattice LiVO₂revealed by ⁵¹V NMR
T. Jin-no, Y. Shimizu, M. Itoh, S. Niitaka, and H. Takagi
Physical Review B 87, 075135 (2013).
Resonant X-ray Diffraction Study of the Strongly Spin-Orbit-Coupled Mott Insulator CaIrO₃K. Ohgushi, J. Yamaura, H. Ohsumi, K. Sugimoto, S. Takeshita, A. Tokuda, H. Takagi, M. Takata, and T. Arima
Physical Review Letters 110, 217212 (2013).
Optical excitation of Josephson plasma solitons in a cuprate superconductor
A. Dienst, E. Casandruc, D. Fausti, L. Zhang, M. Eckstein, M. Hoffmann, V. Khanna, N. Dean, M. Gensch, S. Winnerl, W. Seidel, S. Pyon, T. Takayama, H. Takagi, and A. Cavalleri
Nature Materials 12, 535-541 (2013).
Photo-assisted aromatic VOC sensing by a p-NiO:Li/n-ZnO transparent heterojunction sensor element
Y. Nakamura, Y. Ishikura, Y. Morita, H. Takagi, and S. Fujitsu
Sensors and Actuators B: Chemical 187, 578-585 (2013).
Memory Effect in a Topological Surface State of Bi₂Te₂Se
Y.-S. Fu, T. Hanaguri, S. Yamamoto, K. Igarashi, H. Takagi, and T. Sasagawa
ACS Nano 7, 4105 (2103).
Spectroscopic indications of polaronic behavior of the strong spin-orbit insulator Sr₃Ir₂O₇
P. D. C. King, T. Takayama, A. Tamai, E. Rozbicki, S. M. Walker, M. Shi, L. Patthey, R. G. Moore, D. Lu, K. M. Shen, H. Takagi, and F. Baumberger
Physical Review B 87, 241106 (2013).
MgSrSi-Type Compounds as a Possible New Family of Thermoelectric Materials
Y. Katsura and H. Takagi
Journal of Electronic Materials 42, 1365-1368 (2013).
Electronic superlattice revealed by resonant scattering from random impurities in Sr₃Ru₂O₇
M. A. Hossain, I. Zegkinoglou, Y.-D. Chuang, J. Geck, B. Bohnenbuck, A. G. Cruz Gonzalez, H.-H. Wu, C. Schüßler-Langeheine, D. G. Hawthorn, J. D. Denlinger, R. Mathieu, Y. Tokura, S. Satow, H. Takagi, Y. Yoshida, Z. Hussain, B. Keimer, G. A. Sawatzky, and A. Damascelli
Scientific Reports 3, 02299 (2013).
Comprehensive Macroscopic Investigation on Hexagonal C14 Laves-Type Ru-Based Superconductors ARu₂ (A = Lu, Y, Sc) with Effective Electron Correlation
S. Niitaka, E. Minamitani, Y. Kim, H. Takagi, and K. Kono
Journal of the Physical Society of Japan 82, 124703 (2013).
A-Type Antiferro-Orbital Ordering with I4₁/a Symmetry and Geometrical Frustration in the Spinel Vanadate MgV₂O₄
S. Niitaka, H. Ohsumi, K. Sugimoto, S. Lee, Y. Oshima, K. Kato, D. Hashizume, T. Arima, M. Takata, and H. Takagi
Physical Review Letters 111, 267201 (2013).
A new “zero-strain” material for electrochemical lithium insertion
Y. Gu, K. Taniguchi, R. Tajima, S. Nishimura, D. Hashizume, A. Yamada, and H. Takagi
Journal of Materials Chemistry A 1, 6550-6552 (2013).
5d iridium oxide as a material for spin-current detection
K. Fujiwara, Y. Fukuma, J. Matsuno, H. Idzuchi, Y. Niimi, Y. Otani, and H. Takagi
Nature Communications 4, 3893 (2013).
Electronic state of spin-orbit coupled Mott insulator Sr₂IrO₄
T.-H. Arima, H. Takagi
Seramikkusu 48, 459-463 (2013).
Observation of rebirth of metallic paths during resistance switching of metal nanowire
K. Horiba, K. Fujiwara, N. Nagamura, S. Toyoda, H. Kumigashira, M. Oshima, and H. Takagi
Applied Physics Letters 103, 193114 (2013).
Thermoelectric properties of semi-metallic Ru₂Sn_3-δ with low thermal conductivity
H. Kawasoko, T. Takayama, H. Takagi
Applied Physics Express 7, 115801 (2014).
Synchrotron X-ray powder diffraction and convergent beam electron diffraction studies on the cubic phase of MgV₂O₄ spinel
S. Niitaka, S. Lee, Y Oshima, K. Kato, D. Hashizume, M. Takata, H. Takagi
Journal of Solid State Chemistry 215, 184-188 (2014).
Superconductivity in an electron band just above the Fermi level: possible route to BCS-BEC superconductivity
K. Okazaki, Y. Ito, Y. Ota, Y. Kotani, T. Shimojima, T. Kiss, S. Watanabe, C.-T. Chen, S. Niitaka, T. Hanaguri, H. Takagi, A. Chainani, and S. Shin
Scientific Reports 4, 4109 (2014).
Superconductivity at 6K and the Violation of Pauli Limit in Ta₂Pd_xS₅
Y. Lu, T. Takayama, A. Bangura, Y. Katsura, D. Hashizume, and H. Takagi
Journal of the Physical Society of Japan 83, 23702 (2014).
Superconductivity at 3.7K in Ternary Silicide Li₂IrSi₃
D. Hirai, R. Kawakami, O. V. Magdysyuk, R. E. Dinnebier, A. Yaresko, and H. Takagi
Journal of the Physical Society of Japan 83, 103703 (2014).
Spin-Orbit Fluctuations in Frustrated Heavy-Fermion Metal LiV₂O₄
K. Tomiyasu, K. Iwasa, H. Ueda, S. Niitaka, H. Takagi, S.Ohira-Kawamura, T. Kikuchi, Y. Inamura, K. Nakajima, and K. Yamada
Physical Review Letters 113, 236402 (2014).
Spin-Orbit coupling induced semi-metallic state in the 1/3 hole-doped hyper-kagome Na₃Ir₃O₈
T. Takayama, A. Yaresko, A. Matsumoto, J. Nuss, K. Ishii, M. Yoshida, J. Mizuki, and H. Takagi
Scientific Reports 4, 6818 (2014).
Spin and Orbital Contributions to Magnetically Ordered Moments in 5d Layered Perovskite Sr₂IrO₄
S. Fujiyama, H. Ohsumi, K. Ohashi, D. Hirai, B. J. Kim, T. Arima, M. Takata, and H. Takagi
Physical Review Letters 112, 016405 (2014).
Low-energy magnetic excitations in the spin-orbital Mott insulator Sr₂IrO₄
S. Bahr, A. Alfonsov, G. Jackeli, G. Khaliullin, A. Matsumoto, T. Takayama, H. Takagi, B. Büchner, and V. Kataev
Physical Review B 89, 180401 (2014).
Phase diagram and optical conductivity of La_1.8-xEu_0.2Sr_xCuO₄
M. Autore, P. Di Pietro, P. Calvani, U. Schade, S. Pyon, T. Takayama, H. Takagi, and S. Lupi
Physical Review B 90, 035102 (2014).
Imaging the two-component nature of Dirac-Landau levels in the topological surface state of Bi₂Se₃
Y.-S. Fu, M. Kawamura, K. Igarashi, H. Takagi, T. Hanaguri, and T. Sasagawa
Nature Physics 10, 815-819 (2014).
Fano Resonances in the Infrared Spectra of Phonons in Hyperkagome Na₃Ir₃O₈
D. Pröpper, A. N. Yaresko, T. I. Larkin, T. N. Stanislavchuk, A. A. Sirenko, T. Takayama,
A. Matsumoto, H. Takagi, B. Keimer, and A. V. Boris
Physical Review Letters 112, 087401 (2014).
Excitonic Bose-Einstein condensation in Ta₂NiSe₅ above room temperature
K. Seki, Y. Wakisaka, T. Kaneko, T. Toriyama, T. Konishi, T. Sudayama, N. L. Saini, M. Arita,
H. Namatame, M. Taniguchi, N. Katayama, M. Nohara, H. Takagi, T. Mizokawa, and Y. Ohta
Physical Review B 90, 155116 (2014).
Electronic Structure of a Quasi-Freestanding MoS₂ Monolayer
T. Eknapakul, P. D. C. King, M. Asakawa, P. Buaphet, R.-H. He, S.-K. Mo, H. Takagi, K. M. Shen,
F. Baumberger, T. Sasagawa, S. Jungthawan, and W. Meevasana
Nano Letters 14, 1312-1316 (2014).
Direct phase-sensitive identification of a d-form factor density wave in underdoped cuprates
K. Fujita, M. H. Hamidian, S. D. Edkins, C. K. Kim, Y. Kohsaka, M. Azuma, M. Takano, H. Takagi, H. Eisaki, S.-i. Uchida, A. Allais, M. J. Lawler, E.-A. Kim, S. Sachdev, and J. C. Séamus Davis
Proceedings of the National Academy of Sciences of the United States of America 111, E3026-E3032 (2014).
Direct observation of spin-polarized bulk bands in an inversion-symmetric semiconductor
J. M. Riley, F. Mazzola, M. Dendzik, M. Michiardi, T. Takayama, L. Bawden, C. Granerød, M. Lean-dersson, T. Balasubramanian, M. Hoesch, T. K. Kim, H. Takagi, W. Meevasana, P. Hofmann, M. S. Bahramy, J. W. Wells, and P. D. C. King
Nature Physics 10, 835-839 (2014).
Commensurate structural modulation in the charge- and orbitally ordered phase of the quadruple perovskite (NaMn₃)Mn₄O₁₂
A. Prodi, A. Daoud-Aladine, F. Gozzo, B. Schmitt, O. Lebedev, G. van Tendeloo, E. Gilioli, F. Bolzoni, H. Aruga-Katori, H. Takagi, M. Marezio, and A. Gauzzi
Physical Review B 90, 180101-180105 (2014).
Reversible Electrochimcal Insertion/Extraction of Mg and Li Ions for Orthorhombic Mo₉Se₁₁ with Cluster Structure
K. Taniguchi, T. Yoshino, Y. Gu, Y. Katsura, and H. Takagi
Journal of the Elctrochemical Society 162, A198-A202 (2015).
Fabrication of (111)-oriented Ga_0.5Sr_0.5IrO₃/SrTiO₃ superlattices – a design playground for honeycomb physics
D. Hirai, J. Matsuno, and H. Takagi
APL Materials 3, 041508 (2015).
Phase Interface Structures in Li_1+xRh₂O₄ Zero Strain Cathode Material Analyzed by Scanning Transmission Electron Microscopy
A. Nakamura, Y. Gu, K. Taniguchi, N. Shibata, H.Takagi, and Y. Ikuhara
Chemistry of Materials 27, 938-943 (2015).
Hyperhoneycomb iridate beta-Li₂IrO₃ as a Platform for Kitaev Mangetism
T. Takayama, A. Kato, R. Dinnebier, J. Nuss, H. Kono, L.S.I. Veiga, G. Fabbris, D. Haskel, and
H. Takagi
Physical Review Letters 114, 077202 (2015).
Thermal Conductivity across the Metal-Insulator Transition in the Single-Crystalline Hyper-kagome Antiferromagnet Na_3+xIr₃O₈
B. Fauqué, X. Xu, A. F. Bangura, E. C. Hunter, A. Yamamoto, K. Behnia, A. Carrington, H. Takagi, N. E. Hussey, and R. S. Perry
Physical Review B 91, 075129 (2015).
Two distinct kinetic regimes for the relaxation of light-induced superconductivity in La_1.675Eu_0.2Sr_0.125CuO₄
C. R. Hunt, D. Nicoletti, S. Kaiser, T. Takayama, H. Takagi, and A. Cavalleri
Physical Review B 91, 020505(R) (2015).
Two distinct kinetic regimes for the relaxation of light-induced superconductivity in La_1.675Eu_0.2Sr_0.125CuO₄ (vol 91, 020505, 2015) correction
C. R. Hunt, D. Nicoletti, S. Kaiser, T. Takayama, H. Takagi, and A. Cavalleri
Physical Review B 91, 059901 (2015).
Evidence for ordered magnetic moments at oxygen sites in antiferromagnetic Sr₂IrO₄ and Sr₃Ir₂O₇
M. Miyazaki, R. Kadono, M. Hiraishi, A. Koda, K. M. Kojima, K. Ohashi, T. Takayama, and H. Takagi
Physical Review B 91, 155113 (2015).
Y₂Ti₂O₅S₂ as a high performance anode material for Li ion batteries
H. Oki, and H. Takagi
Solid State Ionics 276, 80-83 (2015).
Tilting structures in inverse-perovskites, M₃TtO (M= Ca, Sr, Ba, Eu; Tt = Si, Ge, Sn, Pb)
J. Nuss, C. Mühle, K. Hayama, V. Abdolazimi, and H. Takagi
Acta Cryst. B 71, 300-312 (2015).
Programmable persistent interfacial metallic state induced by frozen ions in inorganic-glass solid electrolye
K. Taniguchi, T. Fukamichi, K. Itaka, and H. Takagi
Adv. Funct. Mater. 25, 3043-3048 (2015).
Engineering a spin-orbital magnetic insulator by tailoring superlattices
J. Matsuno, K. Ihara, S. Yamamura, H. Wadati, K. Ishii, V. V. Shankar, Hae-Young Kee,
and H. Takagi
Phys. Rev. Lett. 114, 247209 (2015).
Imaging ambipolar two-dimensional carriers induced by the spontaneous electric polarization of a polar semiconductor BiTeI
Y. Kohsaka, M. Kanou, H. Takagi, T. Hanaguri, and T. Sasagawa
Physical Review B 91, 245312 (2015).
Magnetic fluctuations and possible formation of the spin-singlet cluster under pressure in the heavy fermion spinel LiV₂O₄ probed by ⁷Li and ⁵¹V NMR
H. Takeda, Y. Kato, M. Yoshimura, Y. Shimizu, M. Itoh, S. Niitaka, and H. Takagi
Physical Review B 92, 045103 (2015).
Semimetallic transport properties of epitaxially stabilized perovskite CaIrO₃ films
D. Hirai, J. Matsuno, D. Nishio-Hamane, and H. Takagi
Appl. Phys. Lett. 107, 012104 (2015).
Rechargeable magnesium-ion battery based on a TiSe₂-cathode with d-p orbital hybridized electronic structure
Y. Gu, Y. Katsura, T. Yoshino, H. Takagi, and K. Taniguchi
Scientific Reports 5, 12486 (2015).
Negative electronic compressibility and tunable spin splitting in WSe₂
J. M. Riley, W. Meevasana, L. Bawden, M. Asakawa, T. Takayama, T. Eknapakul, T. K. Kim, M. Hoesch, S.-K. Mo, H. Takagi, T. Sasagawa, M. S. Bahramy, and P. D. C. King
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