Thermoelectric effects in strongly interacting quantum dot coupled to ferromagnetic leads

TL;DR

This paper investigates thermoelectric effects in a strongly interacting quantum dot with ferromagnetic leads, analyzing conductance, thermopower, and thermal conductance, and exploring the impact of lead coupling asymmetry and magnetic configurations.

Contribution

It provides a detailed theoretical analysis of thermoelectric properties in Kondo correlated quantum dots with ferromagnetic contacts, including effects of coupling asymmetry and magnetic alignment.

Findings

Agreement with experimental thermopower measurements

Identification of the impact of lead coupling asymmetry

Discussion of violations of Wiedemann-Franz law

Abstract

We study thermoelectric effects in Kondo correlated quantum dot coupled to ferromagnetic electrodes by calculating conductance, thermopower and thermal conductance in the Kondo regime. We also study the effect of the asymmetry in the coupling to the leads, which has important consequences for anti-parallel magnetization configuration. We discuss the thermoelectric figure of merit, tunnel magnetoresistance and violation of the Wiedemann-Franz law in this system. The results agree with recently measured thermopower of the quantum dot defined in a two dimensional electron gas.