Thermoelectric phenomena in a quantum dot asymmetrically coupled to external leads

Abstract

We study thermoelectric phenomena in a system consisting of strongly correlated quantum dot coupled to external leads in the Kondo regime. We calculate linear and nonlinear electrical and thermal conductance and thermopower of the quantum dot and discuss the role of asymmetry in the couplings to external electrodes. In the linear regime electrical and thermal conductances are modified, while thermopower remains unchanged. In the nonlinear regime the Kondo resonance in differential conductance develops at non-zero source-drain voltage, which has important consequences on thermoelectric properties of the system and the thermopower starts to depend on the asymmetry. We also discuss Wiedemann-Franz relation, thermoelectric figure of merit and validity of the Mott formula for thermopower.

6 pages, 7 figures

References in corpus (2)

• Thermopower of a Kondo-correlated quantum dot
• Thermoelectric effects in a strongly interacting quantum dot coupled to ferromagnetic leads

Cited by in corpus (14)

• Strongly nonlinear thermovoltage and heat dissipation in interacting quantum dots
• Kondo physics and orbital degeneracy interact to boost thermoelectrics on the nanoscale
• Spin-dependent thermoelectric effects in a strongly correlated double quantum dot
• Thermal rectification effect of an interacting quantum dot
• Quantum confinement suppressing electronic heat flow below the Wiedemann-Franz law
• The effect of Coulomb interactions on thermoelectric properties of quantum dots
• Nonequilibrium Seebeck effect and thermoelectric efficiency of Kondo-correlated molecular junctions
• Non-equilibrium thermoelectric transport across normal metal-Quantum dot-Superconductor hybrid system within the Coulomb blockade regime
• Thermoelectric effects in quantum Hall systems beyond linear response
• Thermoelectric properties of a double quantum dot out of equilibrium in Kondo and intermediate valence regimes
• Three-orbital Kondo effect in single quantum dot system with plural electrons
• The thermal conductance of a two-channel Kondo model
• Role of asymmetry in thermoelectric properties of a double quantum dot out of equilibrium
• A Strongly Correlated Quantum-Dot Heat Engine with Optimal Performance: An Non-equilibrium Green's function Approach