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Conductance through a helical state in an Indium antimonide nanowire

Author

Listed:
  • J. Kammhuber

    (Delft University of Technology)

  • M. C. Cassidy

    (Delft University of Technology)

  • F. Pei

    (Delft University of Technology)

  • M. P. Nowak

    (Delft University of Technology
    AGH University of Science and Technology)

  • A. Vuik

    (Delft University of Technology)

  • Ö. Gül

    (Delft University of Technology)

  • D. Car

    (Delft University of Technology
    Eindhoven University of Technology)

  • S. R. Plissard

    (Université de Toulouse)

  • E. P. A. M. Bakkers

    (Delft University of Technology
    Eindhoven University of Technology)

  • M. Wimmer

    (Delft University of Technology)

  • L. P. Kouwenhoven

    (Delft University of Technology)

Abstract

The motion of an electron and its spin are generally not coupled. However in a one-dimensional material with strong spin-orbit interaction (SOI) a helical state may emerge at finite magnetic fields, where electrons of opposite spin will have opposite momentum. The existence of this helical state has applications for spin filtering and cooper pair splitter devices and is an essential ingredient for realizing topologically protected quantum computing using Majorana zero modes. Here, we report measurements of a quantum point contact in an indium antimonide nanowire. At magnetic fields exceeding 3 T, the 2 e 2/h conductance plateau shows a re-entrant feature toward 1 e 2/h which increases linearly in width with magnetic field. Rotating the magnetic field clearly attributes this experimental signature to SOI and by comparing our observations with a numerical model we extract a spin-orbit energy of approximately 6.5 meV, which is stronger than the spin-orbit energy obtained by other methods.

Suggested Citation

  • J. Kammhuber & M. C. Cassidy & F. Pei & M. P. Nowak & A. Vuik & Ö. Gül & D. Car & S. R. Plissard & E. P. A. M. Bakkers & M. Wimmer & L. P. Kouwenhoven, 2017. "Conductance through a helical state in an Indium antimonide nanowire," Nature Communications, Nature, vol. 8(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-00315-y
    DOI: 10.1038/s41467-017-00315-y
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    Cited by:

    1. Fengjing Liu & Xinming Zhuang & Mingxu Wang & Dongqing Qi & Shengpan Dong & SenPo Yip & Yanxue Yin & Jie Zhang & Zixu Sa & Kepeng Song & Longbing He & Yang Tan & You Meng & Johnny C. Ho & Lei Liao & F, 2023. "Lattice-mismatch-free construction of III-V/chalcogenide core-shell heterostructure nanowires," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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