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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.

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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