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Asymmetric Heat Flow in Mesoscopic Magnetic System

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arxiv cond-mat/0602621 v1 pith:FQ73LA4N submitted 2006-02-27 cond-mat.stat-mech cond-mat.mtrl-sci

Asymmetric Heat Flow in Mesoscopic Magnetic System

classification cond-mat.stat-mech cond-mat.mtrl-sci
keywords systemflowheatmagneticasymmetrychaincharacteristicscoupled
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The characteristics of heat flow in a coupled magnetic system are studied. The coupled system is composed of a gapped chain and a gapless chain. The system size is assumed to be quite small so that the mean free path is comparable to it. When the parameter set of the temperatures of reservoirs is exchanged, the characteristics of heat flow are studied with the Keldysh Green function technique. The asymmetry of current is found in the presence of a local equilibrium process at the contact between the magnetic systems. The present setup is realistic and such an effect will be observed in real experiments. We also discuss the simple phenomenological explanation to obtain the asymmetry.

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