Two Electrostatically Coupled Quantum Dot Systems as a Pseudo-Spin Kondo System

Electrical conductance only possible due to correlated electron tunneling through two purely electrostatically coupled quantum dot systems, rising with lowering the temperature.

© MPI-FKF / U. Wilhelm


Electrostatically coupled quantum dots with separate leads show due to their interaction correlated tunneling in both quantum dot systems in parameter regimes where single-electron transport through the individual quantum dots is suppressed. As pointed out by us, such an arrangement can be considered as a pseudo-spin realization of a Kondo system.


Publications

Strongly electrostatically coupled quantum dots with separate leads
U. Wilhelm, J. Weis
Physica E 6, 668 (2000)

Two electrostatically coupled quantum dots as a realization of the Anderson impurity model
U. Wilhelm, J. Schmid, J. Weis, K. von Klitzing
Physica E 9, 625 (2001)

Experimental evidence for spinless Kondo effect in two electrostatically coupled
quantum dot systems

U. Wilhelm, J. Schmid, J. Weis, K. von Klitzing
Physica E 14, 385 (2002)

Two laterally arranged quantum dot systems with strong capacitive interdot coupling
A. Huebel, J. Weis, W. Dietsche, K. v. Klitzing
Applied Physics Letters 91, 1077 (2007)                     

Precise experimental characterization of a double quantum dot system with strong capacitive interdot coupling
A. Huebel, J. Weis, K. von Klitzing
Physica E 40, 1573 (2008)

Correlated Electron Tunneling through Two Separate Quantum Dot Systems with Strong Capacitive Interdot Coupling
A. Huebel, K. Held, J. Weis, K. von Klitzing
Physical Review Letters 101, 186804 (2008)

Theses

Präparation und elektrische Charakterisierung elektrostatisch gekoppelter Quantendotsysteme - Eine Realisierung des Anderson-Störstellenmodells
Ulf Wilhelm, Dissertation, Universität Stuttgart (2000)

Kapazitiv stark gekoppelte Doppelquantenpunkte in GaAs-AlGaAs-Heterostrukturen: Herstellung und elektrischer Transport
Alexander Hübel, Dissertation, Universität Stuttgart (2007)

Annual Reports

Two electrostatically coupled quantum dot systems as a new realization of the Anderson
impurity model
(pdf)
D. Quirion, U. Wilhelm, J. Schmid, J. Weis, K. von Klitzing (2003)

Two quantum dot systems in lateral arrangement with strong electrostatic interaction:
Tool for studying Kondo correlations in electrical transport
(pdf)
J. Weis, A. Hübel, K. Held, K. von Klitzing (2007)

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