中国物理B ›› 2012, Vol. 21 ›› Issue (5): 57402-057402.doi: 10.1088/1674-1056/21/5/057402

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Interfacial spin Hall current in a Josephson junction with Rashba spin–orbit coupling

杨志红1 2,杨永宏1,汪军1   

  1. 1. Department of Physics, Southeast University, Nanjing 210096, China;
    2. College of Science, Nanjing University of Post and Telecommuntion, Nanjing 210046, China
  • 收稿日期:2011-10-09 修回日期:2012-04-27 出版日期:2012-04-01 发布日期:2012-04-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 110704032 and 110704033), the Natural Science Foundation of JiangSu Province, China (Grant No. BK2010416), and the National Basic Research Program of China (Grant No. 2009CB945504).

Interfacial spin Hall current in a Josephson junction with Rashba spin–orbit coupling

Yang Zhi-Hong(杨志红)a)b)†, Yang Yong-Hong(杨永宏)a), and Wang Jun(汪军) a)   

  1. a. Department of Physics, Southeast University, Nanjing 210096, China;
    b. College of Science, Nanjing University of Post and Telecommuntion, Nanjing 210046, China
  • Received:2011-10-09 Revised:2012-04-27 Online:2012-04-01 Published:2012-04-01
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 110704032 and 110704033), the Natural Science Foundation of JiangSu Province, China (Grant No. BK2010416), and the National Basic Research Program of China (Grant No. 2009CB945504).

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摘要： We theoretically investigate the spin transport properties of the Cooper pairs in a conventional Josephson junction with Rashba spin--orbit coupling considered in one of the superconducting leads. It is found that an angle-resolved spin supercurrent flows through the junction and a nonzero interfacial spin Hall current driven by the superconducting phase difference also appears at the interface. The physical origin of this is that the Rashba spin--orbit coupling can induce a triplet order parameter in the s-wave superconductor. The interfacial spin Hall current dependences on the system parameters are also discussed.

关键词: Josephson junction, spin Hall current, Rashba spin--orbit coupling, interfacial current

Abstract: We theoretically investigate the spin transport properties of the Cooper pairs in a conventional Josephson junction with Rashba spin--orbit coupling considered in one of the superconducting leads. It is found that an angle-resolved spin supercurrent flows through the junction and a nonzero interfacial spin Hall current driven by the superconducting phase difference also appears at the interface. The physical origin of this is that the Rashba spin--orbit coupling can induce a triplet order parameter in the s-wave superconductor. The interfacial spin Hall current dependences on the system parameters are also discussed.

Key words: Josephson junction, spin Hall current, Rashba spin--orbit coupling, interfacial current

中图分类号:  (Proximity effects; Andreev reflection; SN and SNS junctions)

  • 74.45.+c
71.70.Ej (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect) 72.25.-b (Spin polarized transport)