TY - JOUR
T1 - Kondo signature in heat transfer via a local two-state system
AU - Saito, Keiji
AU - Kato, Takeo
PY - 2013/11/19
Y1 - 2013/11/19
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.111.214301
DO - 10.1103/PhysRevLett.111.214301
M3 - Article
AN - SCOPUS:84888867166
SN - 0031-9007
VL - 111
JO - Physical Review Letters
JF - Physical Review Letters
IS - 21
M1 - 214301
ER -