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Measurement of microwave impedance of proximitized nanowires using resonators

ORAL

Abstract

We investigate the bulk properties of InAs nanowires proximitized by thin-film aluminium, which are a potential platform for topological quantum computing. We measure the frequency response of a quarter-wave coplanar wave guide resonator shunted by a hybrid Al-InAs nanowire as a function of gate voltage and axial magnetic field. From the detected shift in resonance frequency and quality factor, we extract the complex impedance of the nanowire. Our results show a monotonic dependence of the nanowire inductance and resistance on the gate voltage and an oscillating behaviour as a function of the axial magnetic field. This measurement approach complements existing characterization techniques and may facilitate the identification of the topological phase transition predicted for these hybrid structures.

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Presenters

  • Lukas Johannes Splitthoff

    QuTech, Delft University of Technology

Authors

  • Lukas Johannes Splitthoff

    QuTech, Delft University of Technology

  • Arno Bargerbos

    Delft University of Technology, QuTech, Delft University of Technology, Qutech, Delft University of Technology

  • Lukas Gruenhaupt

    Qutech, Delft University of Technology, QuTech, Delft University of Technology

  • Jaap Wesdorp

    Qutech, Delft University of Technology, QuTech, Delft University of Technology

  • Marta Pita-Vidal

    QuTech, Delft University of Technology

  • James Kroll

    QuTech, Delft University of Technology

  • Peter Krogstrup

    Center for Quantum Devices and Microsoft Quantum Lab Copenhagen, Niels Bohr Institute, University of Copenhagen, Microsoft Quantum Materials Lab and Center for Quantum Devices, Niels Bohr Institute,8University of Copenhagen, Kanalvej 7, 2800 Kongens Lyngby, Denmark, Niels Bohr Institute, University of Copenhagen, Quantum Materials Lab Copenhagen, Microsoft, University of Copenhagen, Center for Quantum Devices and Microsoft Quantum Lab Copenhagen, Niels Bohr Institute, University of Copenhagen, 2100 Copenhagen, Denmark, Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Microsoft Quantum Materials Lab, University of Copenhagen, Niels Bohr Institute, Copenhagen, Niels Bohr Institute

  • 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

  • Angela Kou

    Illinois Quantum Information Science and Technology Center, University of Illinois at Urbana-Champaign, University of Illinois at Urbana-Champaign

  • Bernard Van Heck

    Quantum Lab Delft, Microsoft, Microsoft, Quantum lab Delft, Microsoft, Microsoft Quantum Lab Delft, Delft University of Technology, 2600 GA Delft, The Netherlands