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Professor Andrzej M. Oleś

Max Planck Institute for Solid State Research, Stuttgart

Andrzej M. Oleś is a scientist employed by the Jagiellonian University (JU) since 1973. He received his PhD in physics in 1977 and D.Sc. (Habilitation) from JU in 1984; since 1994 he is a full professor of physics at Marian Smoluchowski Institute of Physics, Faculty of Physics, Astronomy, and Applied Computer Science, Jagiellonian University.

Research

Andrzej M. Oleś is an internationally recognized expert in the theory of electron correlations and quantum theory of magnetism. His papers advanced the theory of magnetic states in transition metals and their oxides, complex phenomena in correlated quantum matter with several degrees of freedom, as well as electron correlations in molecules and high temperature superconductors.

A. M. Oleś collaborates with Quantum Many-Body Theory Department, Max Planck Institute for Solid State Research (MPI-FKF), Stuttgart, Germany, since 1980. He combines research with teaching – he supervised 11 PhD students, including two at MPI-FKF (informally).

He was also an invited professor at: University Paris-Sud in Orsay, University Paris-Nord in Villetaneuse, University Aix-Marseille, Université Caen Normandie, CEA Saclay, Università degli Studi di Salerno, Technical University of Graz, Masaryk University in Brno, University of British Columbia, Vancouver, and Tokyo Institute of Technology.

A. M. Oleś published over 400 papers, mostly in major journals. His papers are well known and cited; the total number of citations is over 6,500, Hirsch index h=42.

Laureate of scientific awards

Laureate of several scientific awards; the list includes:

Marian-Smoluchowski–Emil-Warburg Prize 2017 "For his contributions to understanding complex types of order in condensed matter, in particular including electron orbital degrees of freedom"

Scientific Prize of the Polish Minister of Science, 2016 "For outstanding achievements in fundamental research"

Maria-Skłodowska-Curie Prize of the Polish Academy of Sciences 2009 "For the discovery of spin-orbital entanglement in transition metal oxides with orbital degrees of freedom"

Research grant "MISTRZ" awarded by the Foundation for Polish Science 2007

Seven scientific awards for research given by the Ministry of Science in Poland

Refereeing for journals, awards, and grants

A. M. Oleś was selected as an Outstanding Referee by the American Physical Society in 2009. He serves also as a referee for several other journals.

He was consulted several times for suggesting candidates for The Nobel Prize in Physics and for EPS Prize for Outstanding Achievement in Condensed Matter Physics.

A. M. Oleś was also a referee of several international research grants, professorships, and scientific degrees at universities abroad.

Humboldt Research Award for Professor Andrzej M. Oleś

Professor Andrzej M. Oleś received Humboldt Research Award (Humboldt-Forschungspreis) in recognition of his entire achievements in the theoretical physics of condensed matter.

The works of A. M. Oleś advanced the field of electron correlations in transition metals, Mott insulators, and high-Tc superconductors. He introduced important concepts in the theory of quantum materials with several interacting degrees of freedom, in particular discovered the quantum aspects of spin-orbital physics, including such phenomena as fluctuations and entanglement. The most important discoveries were completed in the collaboration with his collegues from Quantum Many-Body Theory Department in Max Planck Institute for Solid State Research.

Phase diagram of the Compass-Heisenberg model in the (J<sub>x</sub>,I)-plane for fixed AF interaction J<sub>z </sub>= 1. Long-range order is stabilized by any finite Heisenberg interaction I. Square and diamond at the compass line indicate multi-critical points, where four ordered phases meet. The spin order of the different phases is depicted in a corresponding inset, and the subscript indicates the type of symmetry breaking in spin space. Straight lines separating the phases follow from symmetry; in two cases they are modified by quantum corrections.<br /><strong><em>F. Trousselet, A. M. Ole</em></strong><strong><em>ś, P. Horsch</em></strong>, Magnetic Properties of Nanoscale Compass-Heisenberg Planar Clusters, Physical Review B <strong>86</strong>, 134412 (2012). Zoom Image
Phase diagram of the Compass-Heisenberg model in the (Jx,I)-plane for fixed AF interaction Jz = 1. Long-range order is stabilized by any finite Heisenberg interaction I. Square and diamond at the compass line indicate multi-critical points, where four ordered phases meet. The spin order of the different phases is depicted in a corresponding inset, and the subscript indicates the type of symmetry breaking in spin space. Straight lines separating the phases follow from symmetry; in two cases they are modified by quantum corrections.
F. Trousselet, A. M. Oleś, P. Horsch, Magnetic Properties of Nanoscale Compass-Heisenberg Planar Clusters, Physical Review B 86, 134412 (2012).

O

The selected papers listed here introduce new fundamental concepts:

The importance of novel quantum orbital fluctuations in spin-orbital systems was discovered by Feiner, Oleś, and Zaanen in [1]. The interplay between spin and orbital degrees of freedom in transition metal oxides is described in detail in [2], including some cases where the interpretation requires spin-orbital entanglement [3]. For a hole doped Mott insulator, as e. g. LaVO3, he introduced spin-orbital polarons, explaining that the orbital degrees of freedom confine the spin dynamics and generate the string potential of the joint spin-orbital character [4]. Recent research concentrates on the impact of various defect states in spin-orbital systems, including the orbital dilution in doped ruthenates [5].

[1] L. F. Feiner, A. M. Oleś, J. Zaanen
Quantum Melting of Magnetic Order due to Orbital Fluctuations
Physical Review Letters 78, 2799-2802 (1997)

[2] A. M. Oleś, G. Khaliullin, P. Horsch, L. F. Feiner
Fingerprints of Spin-Orbital Physics in Cubic Mott Insulators:
Magnetic Exchange Interactions and Optical Spectral Weights
Physical Review B 72, 214431/1-32 (2005)

[3] A. M. Oleś, P. Horsch, L. F. Feiner, G. Khaliullin
Spin-Orbital Entanglement and Violation of the Goodenough-Kanamori Rules
Physical Review Letters 96, 147205/1-4 (2006)

[4] K. Wohlfeld, A. M. Oleś, P. Horsch
Orbitally Induced String Formation in the Spin-Orbital Polarons
Physical Review B 79, 224433/1-17 (2009)
[Editor's choice and Viewpoint in Physics]

[5] W. Brzezicki, A. M. Oleś, M. Cuoco
Spin-Orbital Order Modified by Orbital Dilution in Transition Metal Oxides:
From Spin Defects to Frustrated Spins Polarizing Host Orbitals
Physical Review X 5, 011037/1-28 (2015)


 
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