Spin transport in ferromagnet-InSb nanowire quantum devices

ORAL

Abstract

Semiconductor nanowires (NWs) such as InSb are a leading platform for realizing future Majorana zero modes based on quantum computing1. However, the appliance of external magnetic fields can suppress the superconductivity and place geometric restrictions on the device. These challenges can be circumvented by integrating magnetic elements with the NWs. In our experiments, by fabrication ferromagnetic contacts, we investigate spin transport across InSb NWs in a quasi-1D ballistic regime2. Hysteretic magnetoconductance can be observed proving spin-polarized transport across the NWs. Moreover, we show that electrostatic gating tunes the observed hysteretic signal and also reveals a transport regime where the device acts as a spin filter.

1. Mourik, V. et al. Signatures of Majorana Fermions in Hybrid Superconductor-Semiconductor Nanowire Devices. Science 336, 1003–1007 (2012).
2. Yang, Z. et al. Spin transport in ferromagnet-InSb nanowire quantum devices, arXiv:1909.07431 (2019).

*Supported primarily by the Department of Energy under Award No. DE-SC-0019274.
Nanowire growth was supported by the European Research Council (ERC HELENA 617256), and the Dutch Organization for Scientific Research (NWO).

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Presenters

  • Zedong Yang

    • School pf Physics and Astronomy, University of Minnesota

Authors

  • Zedong Yang

    • School pf Physics and Astronomy, University of Minnesota

  • Brett Heischmidt

    • School pf Physics and Astronomy, University of Minnesota
    • University of Minnesota

  • Sasa Gazibegovic

    • Dept. of Physics, Technical University, Eindhoven, The Netherlands
    • Eindhoven University of Technology
    • Department of Applied Physics, Eindhoven University of Technology
    • Applied Physics, Eindhoven Univ. of Technology
    • TU Eindhoven

  • Ghada Badawy

    • Dept. of Physics, Technical University, Eindhoven, The Netherlands
    • Eindhoven University of Technology
    • Department of Applied Physics, Eindhoven University of Technology
    • Applied Physics, Eindhoven Univ. of Technology
    • TU Eindhoven

  • Diana Car

    • Eindhoven University of Technology

  • Paul Crowell

    • School of Physics and Astronomy, University of Minnesota, Twin Cities
    • School pf Physics and Astronomy, University of Minnesota
    • University of Minnesota

  • Erik Bakkers

    • Dept. of Physics, Technical University, Eindhoven, The Netherlands
    • Eindhoven University of Technology
    • Department of Applied Physics, Eindhoven University of Technology
    • Applied Physics, Eindhoven Univ. of Technology
    • TU Eindhoven
    • Applied Physics, Eindhoven University of Technology

  • Vlad Pribiag

    • University of Minnesota
    • School pf Physics and Astronomy, University of Minnesota
    • School of Physics and Astronomy, University of Minnesota