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

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.