Revisiting thermoelectric transport across strongly correlated quantum dot: A Green's function equation of motion theory perspective

TL;DR

This paper investigates thermoelectric transport in a strongly correlated quantum dot using Green's function equations of motion, emphasizing the importance of self-consistency for accurate results across different regimes.

Contribution

It introduces a self-consistent Green's function approach within Lacroix decoupling to analyze thermoelectric properties of quantum dots in the Kondo regime.

Findings

Qualitative agreement with existing theoretical results

Highlights the necessity of self-consistent treatment for accurate thermoelectric predictions

Analyzes properties across temperature regimes from Kondo to Coulomb blockade

Abstract

Using Green's function equation of motion within Lacroix decoupling scheme, we examine the thermoelectric transport features of a strongly interacting quantum dot coupled between metallic leads. We demonstrate that a qualitative description of the thermoelectric transport in the Kondo regime requires a complete self-consistent treatment of Green's function. The linear thermoelectric properties, including electrical conductivity, thermal conductivity, thermopower, and figure of merit, are analyzed as a function of temperature ranging from Kondo to Coulomb blockade regime. The results presented here are qualitatively consistent with existing results obtained using different theoretical techniques.