High magnetic field compatible nanowire hybrids (part I): Conductance spectroscopy

ORAL

Abstract

Semiconductor nanowires coupled to superconductors are promising candidates for realizing topological superconductivity in solid state systems. The first generation of nanowire-superconductor devices utilized Nb based alloys with large superconducting gaps providing opportunity to operate at high magnetic fields and temperatures. Due to the soft gap, Nb-based superconductors were subsituted with Aluminum. As a result, hard gap and parity conserving transport are commonly observed in III-V/Al hybrids. A limiting factor for Al based systems is a rather narrow parameter space defined by small superconducting gap and resulting modest magnetic field resilience. I will discuss opportunities for increasing field compatibility of InSb/Al hybrids by lifting the Pauli limit within the superconducting segment. Furthermore, I will present how such an approach can be utilized for reaching critical field values doubling the values reported so far. Finally, I will present results of conductance spectroscopy of InSb/Al nanowire devices taken at high magnetic fields.

*This work has been financially supported by the Dutch Organization for Scientific Research (NWO), the Foundation for Fundamental Research on Matter (FOM) and Microsoft Corperation Station Q.

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Presenters

  • Grzegorz Mazur

    • Delft University of Technology

Authors

  • Grzegorz Mazur

    • Delft University of Technology

  • Nick van Loo

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

  • Marina Quintero-Peréz

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

  • Jiyin Wang

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

  • Peter Vinke

    • Delft University of Technology

  • Robin Dekker

    • Delft University of Technology

  • Francesco Borsoi

    • Delft University of Technology

  • Mariusz Andrzejczuk

    • Microsoft Station Q Delft

  • 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

  • Erik P. A. M. Bakkers

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

  • Sebastian Heedt

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

  • Leo Kouwenhoven

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