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InSb Nanostructures for Advanced Quantum Devices

ORAL

Abstract

Indium-antimonide (InSb) nanowires (NWs) constitute a suitable platform for hosting Majorana zero modes, a key requirement for fault-tolerant topological quantum computing, due to their high electron mobility and strong spin-orbit coupling.
Building devices based on InSb nanostructures, while maintaining their pristine quality has proven to be rather challenging. Firstly, brought forth by the difficulties to obtain high quality nanostructures and secondly due to the fabrication steps required to transform a single nanostructure into a working device.
Here, we show the growth of pure zinc blende InSb NWs and nanosheets. The high chemical purity of these nanostructures is reflected in the higher electron mobility values as compared to so far reported values for InSb nanostructures. Further, we use the high degree of control over growing both 1-dimensional (1D) and 2-dimensional (2D) nanostructures on the same substrate, to design in-situ quantum device structures. In particular, by relying on both InSb NWs and nanosheets to shadow deposit superconductors and normal metals we design a variety of devices ranging from Josephson Junctions to hybrid superconductor/semiconductor devices, while circumventing the harsh processing steps which degrade the device quality.

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Presenters

  • Ghada Badawy

    Eindhoven University of Technology

Authors

  • Ghada Badawy

    Eindhoven University of Technology

  • 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

  • Philipp Leubner

    University of Wurzburg, Eindhoven University of Technology

  • Francesco Borsoi

    QuTech, Delft University of Technology, Delft University of Technology, TU Delft

  • Sebastian Heedt

    Microsoft Quantum Lab Delft, Microsoft station Q Delft, Microsoft Corp Delft

  • Jie Shen

    TU Delft, Delft University of Technology

  • Folkert De Vries

    Physics, ETH Zurich, ETH Zurich

  • Sebastian Koelling

    Eindhoven University of Technology

  • Marcel Verheijen

    Applied Physics, Eindhoven Univ. of Technology, Eurofins

  • Leo P Kouwenhoven

    Dept. of Physics, Technical University, Delft, The Netherlands, Microsoft Quantum Lab Delft, Microsoft Quantum Lab Delft, Delft University of Technology, Microsoft Corp Delft, Quantum Lab Delft, Microsoft, Delft University of Technology, QuTech and Kavli Institute of Nanoscience, Delft University of Technology, Microsoft Corp

  • 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