Thermopower of Kondo Effect in Single Quantum Dot Systems with Orbital at Finite Temperatures

TL;DR

This paper studies how the orbital Kondo effect influences thermopower in single quantum dot systems, revealing the impact of tunneling asymmetry under various controls using the noncrossing approximation.

Contribution

It introduces a detailed analysis of thermopower behavior in quantum dots with orbital Kondo effects, highlighting the effects of asymmetry and external controls.

Findings

Thermopower is significantly affected by tunneling resonance asymmetry.

Gate voltage and magnetic field can modulate the thermopower.

Orbital Kondo effect enhances thermoelectric response.

Abstract

We investigate the thermopower due to the orbital Kondo effect in a single quantum dot system by means of the noncrossing approximation. It is elucidated how the asymmetry of tunneling resonance due to the orbital Kondo effect affects the thermopower under gate-voltage and magnetic-field control.