Single-shot fabrication of semiconducting-superconducting nanowire devices

ORAL

Abstract

Semiconducting-superconducting nanowires attract widespread interest owing to the presence of elusive Majorana zero modes, which hold promise for topological quantum computation. The systematic search for Majoranas signatures is challenging because it requires reproducible hybrid devices and reliable fabrication methods. Here, we exploit a fabrication platform based on shadow walls that enables the in-situ, selective and consecutive depositions of superconductors and normal metals to form normal-superconducting junctions. Crucially, this method allows realizing devices in a single shot, eliminating fabrication steps after the synthesis of the fragile semiconductor/superconductor interface. At the atomic level, all investigated devices reveal a sharp and defect-free semiconducting-superconducting interface and, correspondingly, we measure electrically a hard induced superconducting gap. While the cleanliness of our technique enables systematic studies of topological superconductivity in nanowires, it also allows for the synthesis of advanced nano-devices based on a wide range of material combinations and geometries while maintaining an exceptionally high interface quality.

*NWO
Microsoft Corporation Station Q
the POIR.04.04.00-00-3FD8/17 project (HOMING programme)

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Presenters

  • Francesco Borsoi

    • Delft University of Technology

Authors

  • Francesco Borsoi

    • Delft University of Technology

  • Grzegorz Mazur

    • Delft University of Technology
    • QuTech and Kavli Institute for Nanoscience, Delft University of Technology

  • Nick van Loo

    • Delft University of Technology
    • QuTech and Kavli Institute for Nanoscience, Delft University of Technology

  • Michal Nowak

    • Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology

  • Leo Bourdet

    • Delft University of Technology

  • Kongyi Li

    • Delft University of Technology
    • Microsoft Quantum Lab Delft

  • Svetlana Korneychuk

    • Delft University of Technology

  • Alexandra Fursina

    • Microsoft Quantum Lab Delft

  • Elvedin Memisevic

    • Delft University of Technology
    • QuTech and Kavli Institute for Nanoscience, Delft University of Technology

  • Ghada Badawy

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

  • Sasa Gazibegovic

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

  • Kevin Van Hoogdalem

    • Microsoft Quantum Lab Delft

  • Erik P. A. M. Bakkers

    • Eindhoven University of Technology
    • Department of Applied Physics, Eindhoven University of Technology
    • TU Eindhoven

  • Leo Kouwenhoven

    • Microsoft Quantum Lab Delft, Delft University of Technology
    • Delft University of Technology
    • Quantum Labs Delft, Microsoft
    • Microsoft Quantum Lab Delft
    • Quantum Lab Delft, Microsoft
    • Microsoft Corp

  • Sebastian Heedt

    • Microsoft station Q Delft
    • Microsoft Station Q Delft
    • Microsoft Quantum Lab Delft
    • Station Q Delft, Microsoft

  • Marina Quintero-Peréz

    • Microsoft Station Q Delft
    • Microsoft Quantum Lab Delft
    • Station Q Delft, Microsoft