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Controlled spatial separation of spins and coherent dynamics in spin-orbit-coupled nanostructures

Author

Listed:
  • Shun-Tsung Lo

    (National Cheng Kung University)

  • Chin-Hung Chen

    (National Cheng Kung University)

  • Ju-Chun Fan

    (National Cheng Kung University)

  • L. W. Smith

    (Cavendish Laboratory
    Present address: Department of Physics, National Cheng Kung University, Tainan 701, Taiwan)

  • G. L. Creeth

    (University College London)

  • Che-Wei Chang

    (National Cheng Kung University)

  • M. Pepper

    (University College London)

  • J. P. Griffiths

    (Cavendish Laboratory)

  • I. Farrer

    (Cavendish Laboratory
    Present address: Department of Electronic & Electrical Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK)

  • H. E. Beere

    (Cavendish Laboratory)

  • G. A. C. Jones

    (Cavendish Laboratory)

  • D. A. Ritchie

    (Cavendish Laboratory)

  • Tse-Ming Chen

    (National Cheng Kung University)

Abstract

The spatial separation of electron spins followed by the control of their individual spin dynamics has recently emerged as an essential ingredient in many proposals for spin-based technologies because it would enable both of the two spin species to be simultaneously utilized, distinct from most of the current spintronic studies and technologies wherein only one spin species could be handled at a time. Here we demonstrate that the spatial spin splitting of a coherent beam of electrons can be achieved and controlled using the interplay between an external magnetic field and Rashba spin–orbit interaction in semiconductor nanostructures. The technique of transverse magnetic focusing is used to detect this spin separation. More notably, our ability to engineer the spin–orbit interactions enables us to simultaneously manipulate and probe the coherent spin dynamics of both spin species and hence their correlation, which could open a route towards spintronics and spin-based quantum information processing.

Suggested Citation

  • Shun-Tsung Lo & Chin-Hung Chen & Ju-Chun Fan & L. W. Smith & G. L. Creeth & Che-Wei Chang & M. Pepper & J. P. Griffiths & I. Farrer & H. E. Beere & G. A. C. Jones & D. A. Ritchie & Tse-Ming Chen, 2017. "Controlled spatial separation of spins and coherent dynamics in spin-orbit-coupled nanostructures," Nature Communications, Nature, vol. 8(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15997
    DOI: 10.1038/ncomms15997
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    Cited by:

    1. Qing Rao & Wun-Hao Kang & Hongxia Xue & Ziqing Ye & Xuemeng Feng & Kenji Watanabe & Takashi Taniguchi & Ning Wang & Ming-Hao Liu & Dong-Keun Ki, 2023. "Ballistic transport spectroscopy of spin-orbit-coupled bands in monolayer graphene on WSe2," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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