Thermopower, figure of merit, quantum dot, Kondo effect, orbital degrees of freedom

2007/03/14 by Rui Sakano, Sakano, Rui, Tomoko Kita +3
Chemistry · Earth and Planetary Sciences · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Advanced Thermodynamics and Statistical Mechanics #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Strongly Correlated Electrons (cond-mat.str-el) #nanoparticles nucleation surface interactions

paper · pdf · doi:10.48550/arxiv.cond-mat/0703389

openalex publication_date 2007/03/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We study the thermopower and some related transport quantities due to the orbital Kondo effect in a single quantum dot system with a finite value of Coulomb repulsion by means of the noncrossing approximation applied to the multiorbital impurity Anderson model. It is elucidated how the asymmetry of the renormalized tunneling resonance due to the two-orbital Kondo effect causes characteristic behavior of the thermopower at finite temperatures under gate-voltage and magnetic-field control, which is compared with that of the ordinary spin Kondo effect.

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