Observing pairs of zero-bias end states in three-terminal superconductor-semiconductor devices: Part II

ORAL

Abstract

Majorana zero-energy modes located at the ends of topological superconductors are an appealing platform for topological quantum computing. Zero-bias peaks (ZBPs) are ubiquitously observed in tunneling spectroscopy of hybrid superconductor-semiconductor nanowires, consistent with expectations for Majorana modes. However, the emergence of those zero-energy modes in pairs at the ends of 1D topological superconductors is a central -- and so far untested -- prediction. Enabled by recent materials breakthroughs in selective area growth (SAG), we demonstrate a platform for testing this prediction by probing the conductance matrix of a three-terminal InAs wire proximitized by Al. We perform tunneling spectroscopy independently on both ends of the wire as a function of longitudinal magnetic field and voltage. ZBPs emerge which are correlated and robust for these parameters.

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Presenters

  • Esteban A Martinez

    University of Copenhagen

Authors

  • Esteban A Martinez

    University of Copenhagen

  • Denise Puglia

    University of Copenhagen

  • Gian-Luca Anselmetti

    University of Copenhagen

  • Gerbold Menard

    University of Copenhagen

  • Filip Malinowski

    Delft University of Technology, University of Copenhagen, QuTech and Kavli Institute of Nanoscience, Delft University of Technology, Center for Quantum Devices, Niels Bohr Institute, QuTech and Kavli Institute of Nanoscience, Delft University of Technology, Delft, The Netherlands

  • Geoffrey C. Gardner

    Microsoft, Microsoft Quantum at Station Q Purdue, Purdue University, Microsoft Quantum at Station Q Purdue, Purdue University, West Lafayette, Indiana 47907, USA, Microsoft Station Q Purdue, Birck Nanotechnology Center, Purdue University, Department of Physics and Astronomy, Purdue University, Microsoft Quantum at Station Q Purdue, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA, Purdue University, Station Q Purdue

  • Sergei Gronin

    Microsoft, Microsoft Quantum at Station Q Purdue, Purdue University, Department of Physics and Astronomy, Purdue University, Microsoft Quantum at Station Q Purdue, Purdue University, West Lafayette, Indiana 47907, USA, Microsoft Station Q Purdue, Department of Physics and Astronomy and Station Q Purdue, Purdue University

  • Ray Kallaher

    Microsoft, Microsoft Quantum at Station Q Purdue, Purdue University, West Lafayette, Indiana 47907, USA, Birck Nanotechnology Center, Purdue University, Microsoft Quantum at Station Q Purdue, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA

  • Joon Sue Lee

    University of California - Santa Barbara, University of California Santa Barbara, Dept. of ECE, University of California Santa Barbara, California NanoSystems Institute, University of California, Santa Barbara, Department of Physics, The Pennsylvania State University, University of California, Santa Barbara

  • Sukgeun Choi

    University of California - Santa Barbara, University of California Santa Barbara

  • Mihir Pendharkar

    University of California - Santa Barbara, University of California Santa Barbara, Dept. of ECE, University of California Santa Barbara, Department of Electrical and Computer Engineering, University of California, Santa Barbara, Electrical and Computer Engineering, University of California, Santa Barbara, University of California Santa Barbara, Materials Engineering, University of California, Santa Barbara

  • Chris Palmstrom

    University of California, Santa Barbara, University of California - Santa Barbara, University of California Santa Barbara, Electrical & Computer Engineering, University of California, Santa Barbara, ECE and Materials, University of California, Santa Barbara, Dept. of ECE, University of California Santa Barbara, Materials Department, University of California, Santa Barbara, Materials Engineering, University of California, Santa Barbara, University of California Santa Barbara, Materials Engineering, Departments of Electrical and Computer Engineering and Materials, University of California, Santa Barbara

  • Michael Manfra

    Purdue University, Microsoft, Department of Physics and Astronomy and Station Q Purdue, Purdue University, Department of Physics and Astronomy, Purdue University, Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907 USA, Microsoft Station Q Purdue, Physics and Astronomy, Purdue University, Department of Physics and Astronomy, School of Materials Engineering and School of Electrical and Computer Engineering, Purdue University, Station Q Purdue and Department of Physics and Astronomy, Purdue University, Dept. of Physics, Purdue University, Department of Physics and Astronomy and Station Q Purdue, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA, Dept. of Physics and Astronomy, Purdue, Purdue University, Station Q Purdue, Department of Physics and Astronomy, Station Q Purdue, and Birck Nanotechnology Center, Purdue University

  • Charles M Marcus

    Microsoft, Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Center for Quantum Devices, University of Copenhagen, Center for Quantum Devices and Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark, Center for Quantum Devices and Microsoft Quantum Lab--Copenhagen, Niels Bohr Institute, University of Copenhagen, Niels Bohr Institute, University of Copenhagen, Niels Bohr Institute, Center for Quantum Devices, Niels Bohr Institute, Center for Quantum Devices, Station Q Copenhagen, Niels Bohr Institute, University of Copenhagen, Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark, University of Copenhagen, Center for Quantum Devices and Station Q Copenhagen, University of Copenhagen

  • Andrew P Higginbotham

    JILA, University of Colorado Boulder, Microsoft

  • Lucas Casparis

    Microsoft, Niels Bohr Institute, Univ of Copenhagen, Niels Bohr Institute, Center for Quantum Devices and Microsoft Quantum Lab–Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark, Microsoft Quantum Research, Copenhagen