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Non-Majorana quantized zero-bias conductance peaks in semiconductor nanowire devices

ORAL

Abstract

Quantized zero bias conductance peaks are predicted and reported in InSb nanowire devices coupled to NbTiN superconductors under certain conditions that are compatible with Majorana zero modes. These conditions include induced superconductivity, spin-orbital coupling, and an external magnetic field. We observed quantized zero bias conductance peaks at one end of similar nanowire devices, without observing matching zero bias peak of any height on the other side. These results imply either a topological segment shorter than the superconducting segment which is 400 nm, or a non-Majorana origin of the observed quantized zero-bias peaks.

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Presenters

  • Maksim Gomanko

    Univ of Pittsburgh

Authors

  • Maksim Gomanko

    Univ of Pittsburgh

  • Peng Yu

    Univ of Pittsburgh

  • 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

  • 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

  • Roy Op het Veld

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

  • 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

  • Jun Chen

    Univ of Pittsburgh, University of Pittsburgh

  • Sergey M Frolov

    Dept. of Physics, Univ. of Pittsburgh, Pittsburgh, PA, USA, Univ of Pittsburgh, University of Pittsburgh, Physics, Univ. of Pittsburgh