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High magnetic field compatible nanowire hybrids (part II): exploring bulk induced superconductivity

ORAL

Abstract

Semiconductor nanowires coupled to superconductors are promising candidates for realizing topological superconductivity in solid state systems. We have developed a technique which increases the field compatibility of InSb/Al hybrids dramatically, of which the basic characterization is discussed in the previous talk (Conductance spectroscopy of high magnetic field compatible nanowire hybrids (part I)). In this work, we go beyond standard density-of-states spectroscopy. In a 3-terminal geometry, we explore the induced superconductivity in the bulk of these hybrids by means of non-local conductance measurements. At the two ends of the superconducting section, we use local spectroscopy to probe the density of states in the nanowire. At the same time, we measure the non-local signal and track the evolution of the induced gap in the bulk of the nanowire as a function of magnetic field and gate voltage. Crucially, the combination of high-mobility semiconducting wires and a field-resilient superconductor allows us to operate these hybrids at magnetic fields which are uniquely accessible in our system.

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Presenters

  • Nick van Loo

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

Authors

  • Nick van Loo

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

  • Grzegorz Mazur

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

  • Jiyin Wang

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

  • Robin Dekker

    Delft University of Technology

  • 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