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Versatile and selective platform for high-quality hybrid semiconductor-superconductor nanowire devices.

ORAL

Abstract

Majorana bound states and topological superconductivity are highly anticipated candidates for decoherence-free quantum computation. To achieve this goal, high-quality semiconductor-superconductor hybrid systems are the most promising platform. Here, we combine high-mobility semiconductor nanowires with selective deposition of a superconducting material, resulting in state-of-the-art hybrid devices. We benchmark our devices by investigating InSb/Al Josephson junctions. In voltage-bias spectroscopy, we observe multiple Andreev reflections indicating a highly-transparent interface. Furthermore, in current-bias spectroscopy we observe remarkably high critical currents. Finally, we emphasize that we have developed a versatile platform which can easily be used to investigate different material combinations. In addition, it can be used to create sophisticated quantum circuits for the purpose of demonstrating the proof of principle of a topological qubit.

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Presenters

  • Nick Loo

    QuTech, Delft University of Technology, Delft University of Technology

Authors

  • Nick Loo

    QuTech, Delft University of Technology, Delft University of Technology

  • Greg P. Mazur

    Delft University of Technology

  • Sebastian Heedt

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

  • Marina Quintero Perez

    Microsoft Quantum Lab Delft, Microsoft station Q Delft

  • Francesco Borsoi

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

  • Alexandra Fursina

    Microsoft Quantum Lab Delft, Microsoft station Q Delft

  • May An van de Poll

    Delft University of Technology

  • Kevin Van Hoogdalem

    Microsoft Quantum Lab Delft, Microsoft station Q Delft

  • 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

  • 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

  • Leo P. Kouwenhoven

    Microsoft station Q Delft, Microsoft Quantum Lab Delft