中国物理B ›› 2011, Vol. 20 ›› Issue (2): 27301-027301.doi: 10.1088/1674-1056/20/2/027301

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Thermopower in parallel double quantum dots with Rashba spin–orbit interaction

吕天全1, 崔莲1, 贺泽龙1, 薛惠杰2, 尹海涛3, 张红晨4   

  1. (1)Department of Physics, Center for Condensed Matter Science and Technology, Harbin Institute of Technology, Harbin 150001, China; (2)Department of Physics, Center for Condensed Matter Science and Technology, Harbin Institute of Technology, Harbin 150001, China; Heilongjiang Key Laboratory for Low Dimensional and Mesoscopic Physics, School of Physics and Electronic Engineering, Harbin N; (3)Heilongjiang Key Laboratory for Low Dimensional and Mesoscopic Physics, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China; (4)Space Materials and Environment Engineering Laboratory, Harbin Institute of Technology, Harbin 150001, China
  • 收稿日期:2010-06-22 修回日期:2010-09-08 出版日期:2011-02-15 发布日期:2011-02-15
  • 基金资助:
    Project supported by the Scientific Research Fund of Heilongjiang Provincial Education Department of China (Grant No. 11551145).

Thermopower in parallel double quantum dots with Rashba spin–orbit interaction

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(崔莲)a), and He Ze-Long(贺泽龙)a)   

  1. 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:2010-06-22 Revised:2010-09-08 Online:2011-02-15 Published:2011-02-15
  • Supported by:
    Project supported by the Scientific Research Fund of Heilongjiang Provincial Education Department of China (Grant No. 11551145).

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摘要： Based on the Green's function technique and the equation of motion approach, this paper theoretically studies the thermoelectric effect in parallel coupled double quantum dots (DQDs), in which Rashba spin--orbit interaction is taken into account. Rashba spin--orbit interaction contributions, even in a magnetic field, are exhibited obviously in the double quantum dots system for the thermoelectric effect. The periodic oscillation of thermopower can be controlled by tunning the Rashba spin--orbit interaction induced phase. The interesting spin-dependent thermoelectric effects will arise which has important influence on thermoelectric properties of the studied system.

关键词: quantum dot, thermopower, Rashba spin--orbit interaction, spin-dependent inter-dot coupling

Abstract: Based on the Green's function technique and the equation of motion approach, this paper theoretically studies the thermoelectric effect in parallel coupled double quantum dots (DQDs), in which Rashba spin–orbit interaction is taken into account. Rashba spin–orbit interaction contributions, even in a magnetic field, are exhibited obviously in the double quantum dots system for the thermoelectric effect. The periodic oscillation of thermopower can be controlled by tunning the Rashba spin–orbit interaction induced phase. The interesting spin-dependent thermoelectric effects will arise which has important influence on thermoelectric properties of the studied system.

Key words: quantum dot, thermopower, Rashba spin–orbit interaction, spin-dependent inter-dot coupling

中图分类号:  (Quantum dots)

  • 73.21.La
72.25.Dc (Spin polarized transport in semiconductors) 72.20.Pa (Thermoelectric and thermomagnetic effects)