中国物理B ›› 2018, Vol. 27 ›› Issue (3): 37201-037201.doi: 10.1088/1674-1056/27/3/037201

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Spin flip in single quantum ring with Rashba spin-orbit interation

Duan-Yang Liu(刘端阳), Jian-Bai Xia(夏建白)   

  1. 1 College of Science, Beijing University of Chemical Technology, Beijing 100029, China;
    2 State Key Laboratory for Superlattice and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • 收稿日期:2017-11-14 修回日期:2017-12-26 出版日期:2018-03-05 发布日期:2018-03-05
  • 通讯作者: Duan-Yang Liu E-mail:liudy@mail.buct.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11504016).

Spin flip in single quantum ring with Rashba spin-orbit interation

Duan-Yang Liu(刘端阳)1, Jian-Bai Xia(夏建白)2   

  1. 1 College of Science, Beijing University of Chemical Technology, Beijing 100029, China;
    2 State Key Laboratory for Superlattice and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  • Received:2017-11-14 Revised:2017-12-26 Online:2018-03-05 Published:2018-03-05
  • Contact: Duan-Yang Liu E-mail:liudy@mail.buct.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11504016).

摘要: We theoretically investigate spin transport in the elliptical ring and the circular ring with Rashba spin-orbit interaction. It is shown that when Rashba spin-orbit interaction is relatively weak, a single circular ring can not realize spin flip, however an elliptical ring may work as a spin-inverter at this time, and the influence of the defect of the geometry is not obvious. Howerver if a giant Rashba spin-orbit interaction strength has been obtained, a circular ring can work as a spin-inverter with a high stability.

关键词: Rashba spin-orbit interaction, quantum waveguide, Aharonov-Bohm ring, spin flip spin device

Abstract: We theoretically investigate spin transport in the elliptical ring and the circular ring with Rashba spin-orbit interaction. It is shown that when Rashba spin-orbit interaction is relatively weak, a single circular ring can not realize spin flip, however an elliptical ring may work as a spin-inverter at this time, and the influence of the defect of the geometry is not obvious. Howerver if a giant Rashba spin-orbit interaction strength has been obtained, a circular ring can work as a spin-inverter with a high stability.

Key words: Rashba spin-orbit interaction, quantum waveguide, Aharonov-Bohm ring, spin flip spin device

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

  • 72.25.Dc
73.22.Dj (Single particle states) 73.23.-b (Electronic transport in mesoscopic systems)