Thermospin effects in parallel coupled double quantum dots in the presence of the Rashba spin–orbit interaction and Zeeman splitting

doi:10.1088/1674-1056/21/3/037201

中国物理B ›› 2012, Vol. 21 ›› Issue (3): 37201-037201.doi: 10.1088/1674-1056/21/3/037201

薛惠杰¹ ²,吕天全¹,张红晨³,尹海涛²,催莲¹,贺泽龙¹

收稿日期:2011-04-18 修回日期:2011-10-09 出版日期:2012-02-15 发布日期:2012-02-15
通讯作者: 吕天全,ltq@hit.edu.cn E-mail:ltq@hit.edu.cn

Thermospin effects in parallel coupled double quantum dots in the presence of the Rashba spin–orbit interaction and Zeeman splitting

Xue Hui-Jie(薛惠杰)^a)b), Lü Tian-Quan(吕天全)^a)†, Zhang Hong-Chen(张红晨)^c), Yin Hai-Tao(尹海涛)^b), Cui Lian(催莲)^a), and He Ze-Long(贺泽龙)^a)

a. Department of physics, Center for Condensed Matter Science and Technology, Harbin Institute of Technology, Harbin 150001, China;
b. Heilongjiang Key Laboratory for Low Dimensional and Mesoscopic Physics, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China;
c. Space Materials and Environment Engineering Laboratory, Harbin Institute of Technology, Harbin 150001, China

Received:2011-04-18 Revised:2011-10-09 Online:2012-02-15 Published:2012-02-15
Contact: L? Tian-Quan,ltq@hit.edu.cn E-mail:ltq@hit.edu.cn
Supported by:
Project supported by the Natural Science Foundation of Heilongjiang Province, China (Grant No. F200939).

摘要/Abstract

Abstract: The thermoelectric and the thermospin transport properties, including electrical conductivity, Seebeck coefficient, thermal conductivity, and thermoelectric figure of merit, of a parallel coupled double-quantum-dot Aharonov-Bohm interferometer are investigated by means of the Green function technique. The periodic Anderson model is used to describe the quantum dot system, the Rashba spin-orbit interaction and the Zeeman splitting under a magnetic field are considered. The theoretical results show the constructive contribution of the Rashba effect and the influence of the magnetic field on the thermospin effects. We also show theoretically that material with a high figure of merit can be obtained by tuning the Zeeman splitting energy only.

Key words: thermospin effect, spin Seebeck coefficient, Zeeman splitting, Rashba spin-orbit interaction

中图分类号: (Spin polarized transport in semiconductors)

72.25.Dc

73.21.La (Quantum dots) 72.20.Pa (Thermoelectric and thermomagnetic effects)

薛惠杰, 吕天全, 张红晨, 尹海涛, 催莲, 贺泽龙. [J]. 中国物理B, 2012, 21(3): 37201-037201.

Xue Hui-Jie(薛惠杰), LŰ Tian-Quan(吕天全), Zhang Hong-Chen(张红晨), Yin Hai-Tao(尹海涛), Cui Lian(催莲), and He Ze-Long(贺泽龙) . Thermospin effects in parallel coupled double quantum dots in the presence of the Rashba spin–orbit interaction and Zeeman splitting[J]. Chin. Phys. B, 2012, 21(3): 37201-037201.

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Thermospin effects in parallel coupled double quantum dots in the presence of the Rashba spin–orbit interaction and Zeeman splitting

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