Starts 9 Mar 2017 11:30
Ends 9 Mar 2017 12:30
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ICTP Seminar Series in Condensed Matter and Statistical Physics: Charge Thermopower and Conductance in Interacting Quantum Dot Structures
Abstract:
Charge thermopower in an interacting quantum dot coupled to the leads via assisted hopping modifies the coupling to the two-particle state, which shifts the Kondo exchange coupling constant and exponentially reduces or enhances the Kondo temperature, breaks the particle-hole symmetry, and consequently strongly affects the thermopower. The gate-voltage and temperature dependence of the transport properties is discussed in various regimes. For a particular value of the assisted hopping parameter a peculiar discontinuous behaviour and very high Seebeck coefficient is found [1]. Similar discontinuous behaviour is found in a triple quantum dot system exhibiting regular and singular Fermi liquid transitions [2].
References:
[1] Effect of assisted hopping on thermopower in an interacting quantum dot, S.B. Tooski, A. Ramsak, B.R. Bulka, and R. Zitko, New J. Phys. 16, 055001 (2014).
[2] Regular and singular Fermi liquid in triple quantum dots: Coherent transport studies, S.B. Tooski, A. Ramsak, and B.R. Bulka, Physica E: Low-dimensional Systems and Nanostructures 75, 345 (2016).
Charge thermopower in an interacting quantum dot coupled to the leads via assisted hopping modifies the coupling to the two-particle state, which shifts the Kondo exchange coupling constant and exponentially reduces or enhances the Kondo temperature, breaks the particle-hole symmetry, and consequently strongly affects the thermopower. The gate-voltage and temperature dependence of the transport properties is discussed in various regimes. For a particular value of the assisted hopping parameter a peculiar discontinuous behaviour and very high Seebeck coefficient is found [1]. Similar discontinuous behaviour is found in a triple quantum dot system exhibiting regular and singular Fermi liquid transitions [2].
References:
[1] Effect of assisted hopping on thermopower in an interacting quantum dot, S.B. Tooski, A. Ramsak, B.R. Bulka, and R. Zitko, New J. Phys. 16, 055001 (2014).
[2] Regular and singular Fermi liquid in triple quantum dots: Coherent transport studies, S.B. Tooski, A. Ramsak, and B.R. Bulka, Physica E: Low-dimensional Systems and Nanostructures 75, 345 (2016).