Quantized Majorana Conductance (II): Zero Bias Peak as a Quantized Plateau

ORAL

Abstract

Tunneling into a Majorana state will resolve a zero-bias-peak (ZBP) in the differential conductance. This tunneling process is a so-called Andreev reflection, where an incoming electron is reflected as a hole. Particle-hole symmetry dictates that the zero-energy tunneling amplitudes of electrons and holes are equal, resulting in a perfect resonant transmission with a ZBP-height quantized at 2e2/h, irrespective of the precise tunneling strength. The Majorana-nature of this perfect Andreev reflection is a direct result of the well-known Majorana symmetry property “particle equals antiparticle”. Here we show the observed ZBP-height remains as a constant at 2e2/h, against the change of the tunneling strength, i.e. a quantized Majorana plateau. This quantized tunnel-conductance plateau can uniquely identify a topological Majorana zero-mode as far as tunneling spectroscopy is concerned.

*This work has been supported by the European Research Council (ERC), the Dutch Organization for Scientific Research (NWO), Office of Naval Research (ONR), Laboratory for Physical Sciences (LPS) and Microsoft Corporation Station-Q.

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Presenters

  • Hao Zhang

    • Delft Univ of Tech

Authors

  • Hao Zhang

    • Delft Univ of Tech

  • Di Xu

    • Delft Univ of Tech
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology

  • Chun-Xiao Liu

    • University of Maryland

  • Guanzhong Wang

    • Delft Univ of Tech
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology

  • Nick van Loo

    • Delft Univ of Tech
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology

  • Jouri Bommer

    • Delft Univ of Tech
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology

  • Michiel de Moor

    • Delft Univ of Tech

  • Sasa Gazibegovic

    • Department of Applied Physics, Eindhoven University of Technology
    • Eindhoven Univ of Tech
    • Eindhoven University of Technology

  • Diana Car

    • Eindhoven Univ of Tech
    • Department of Applied Physics, Eindhoven University of Technology
    • Eindhoven University of Technology

  • Roy Op het Veld

    • Eindhoven Univ of Tech
    • Department of Applied Physics, Eindhoven University of Technology
    • Eindhoven University of Technology

  • Petrus van Veldhoven

    • Eindhoven Univ of Tech

  • Sebastian Koelling

    • Eindhoven Univ of Tech

  • Marcel Verheijen

    • Eindhoven Univ of Tech

  • John Logan

    • University of California Santa Barbara
    • Materials Department, University of California
    • University of California-Santa Barbara
    • University of California - Santa Barbara

  • Mihir Pendharkar

    • University of California Santa Barbara
    • Department of Electrical and Computer Engineering, University of California, Santa Barbara
    • University of California - Santa Barbara
    • Univ of California - Santa Barbara

  • Daniel Pennachio

    • University of California Santa Barbara

  • Borzoyeh Shojaei

    • University of California Santa Barbara

  • Joon Sue Lee

    • University of California Santa Barbara
    • California NanoSystems Institute, University of California, Santa Barbara
    • University of California - Santa Barbara
    • Materials Science, University of California - Santa Barbara
    • Univ of California - Santa Barbara

  • Chris Palmstrom

    • University of California Santa Barbara
    • Materials Department, California NanoSystems Institute, Electrical and Computer Engineering, University of California
    • University of California-Santa Barbara
    • California Nanosystems Institute, Dept. of Electrical and Computer Engineering, and Dept. of Materials, Univ of California - Santa Barbara
    • University of California - Santa Barbara
    • Electronics & Computer Enginneering, University of California Santa Barbara
    • Materials Department, University of California, Santa Barbara
    • Materials, University of California Santa Barbara
    • Univ of California - Santa Barbara

  • Erik Bakkers

    • Eindhoven Univ of Tech
    • Department of Applied Physics, Eindhoven University of Technology
    • Eindhoven University of Technology

  • Sankar Das Sarma

    • Univ of Maryland-College Park
    • University of Maryland

  • Leo Kouwenhoven

    • Microsoft Station-Q Delft, Delft University of Technology
    • Delft Univ of Tech
    • Qutech and Kavli Institute of Nanoscience and Microsoft Station Q Delft, Delft University of Technology
    • QuTech, Kavli Institute of Nanoscience, Station Q at Delft University of Technology, Delft University of Technology
    • Microsoft Station-Q at Delft University of Technology
    • Delft Univ. of Technology, Microsoft Station Q
    • Station Q Delft, Microsoft
    • Microsoft Station Q