Thermal Rectification Effect of an Interacting Quantum Dot

Chin. Phys. Lett.

2008, Vol. 25

Issue (8): 3032-3035 DOI:

Original Articles

Thermal Rectification Effect of an Interacting Quantum Dot

CHEN Xue-Ou, DONG Bing, LEI Xiao-Lin

Department of Physics, Shanghai Jiaotong University, 1954 Huashan Road, Shanghai 200030

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CHEN Xue-Ou, DONG Bing, LEI Xiao-Lin 2008 Chin. Phys. Lett. 25 3032-3035

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Abstract We investigate the nonlinear thermal transport properties of a single interacting quantum dot with two energy levels tunnel-coupled to two electrodes using nonequilibrium Green function method and Hartree--Fock decoupling approximation. In the case of asymmetric tunnel-couplings to two electrodes, for example, when the upper level of the quantum dot is open for transport, whereas the lower level is blocked, our calculations predict a strong asymmetry for the heat (energy) current, which shows that the quantum dot system may act as a thermal rectifier in this specific situation.

Keywords: 74.25.Fy 72.10.Bg 73.63.Kv 73.23.Hk

Received: 30 April 2008 Published: 25 July 2008

PACS:	74.25.Fy
	72.10.Bg	(General formulation of transport theory)
	73.63.Kv	(Quantum dots)
	73.23.Hk	(Coulomb blockade; single-electron tunneling)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2008/V25/I8/03032

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