Kondo signature in heat transfer via a local two-state system

Keiji Saito, Takeo Kato

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46 Citations (Scopus)

Abstract

We study the Kondo effect in heat transport via a local two-state system. This system is described by the spin-boson Hamiltonian with Ohmic dissipation, which can be mapped onto the Kondo model with anisotropic exchange coupling. We calculate thermal conductance by the Monte Carlo method based on the exact formula. Thermal conductance has a scaling form κ=(kB2T K/â.,?)f(α,T/TK), where TK and α indicate the Kondo temperature and dimensionless coupling strength, respectively. Temperature dependence of conductance is classified by the Kondo temperature as κâ̂?(T/TK)3 for T≠TK and κâ̂?(kBT/â.,? ωc)2α-1 for Tâ‰TK. Similarities to the Kondo signature in electric transport are discussed.

Original languageEnglish
Article number214301
JournalPhysical review letters
Volume111
Issue number21
DOIs
Publication statusPublished - 2013 Nov 19

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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