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

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Cited by in corpus (24)

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• Strongly nonlinear thermovoltage and heat dissipation in interacting quantum dots
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• Kondo physics and orbital degeneracy interact to boost thermoelectrics on the nanoscale
• Spin-dependent thermoelectric effects in a strongly correlated double quantum dot
• Heat current across a capacitively coupled double quantum dot for high magnetic field
• Local and non-local thermopowers in three-terminal nanostructures
• Enhancing of nonlinear thermoelectric response of a correlated quantum dot in the Kondo regime by asymmetrically coupling to the leads
• Fate of the spin-\frac{1}{2} Kondo effect in the presence of temperature gradients
• Thermal rectification effect of an interacting quantum dot
• The effect of Coulomb interactions on thermoelectric properties of quantum dots
• Quantum confinement suppressing electronic heat flow below the Wiedemann-Franz law
• Nonequilibrium Seebeck effect and thermoelectric efficiency of Kondo-correlated molecular junctions
• Spin-dependent thermoelectric transport through double quantum dots
• Microwave-mediated heat transport through a quantum dot
• 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
• Thermal rectification effects of multiple semiconductor quantum dot junctions
• Designer thermal switches: Effect of the contact material on instantaneous thermoelectric transport through a strongly interacting quantum dot
• A Strongly Correlated Quantum-Dot Heat Engine with Optimal Performance: An Non-equilibrium Green's function Approach