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.

*This activity has been co-financed by the allowance for Top consortia for Knowledge and Innovation (TKI’s) from the Dutch Ministry of Economic Affairs

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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