Thermoelectric effects in a strongly interacting quantum dot coupled to ferromagnetic leads

TL;DR

This paper investigates thermoelectric properties, specifically thermopower, in a Kondo regime quantum dot connected to ferromagnetic leads, highlighting the influence of electrode polarization on thermoelectric behavior.

Contribution

It introduces a theoretical analysis of thermoelectric effects in strongly interacting quantum dots with ferromagnetic contacts, extending previous studies to magnetic electrode configurations.

Findings

Thermopower S depends strongly on electrode polarization.

Results align with experimental data for nonmagnetic leads.

Magnetic electrodes significantly influence thermoelectric responses.

Abstract

We study thermoelectric effects in Kondo correlated quantum dot coupled to ferromagnetic electrodes by calculating thermopower S in the Kondo regime as function of on-dot energy level and temperature. The system is represented by the Anderson model and the results agree well with those recently measured for a quantum dot coupled to nonmagnetic leads. For magnetic electrodes one observes marked dependence of S on the degree of their polarization.