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InSbAs two-dimensional electron gases as a platform for topological superconductivity

ORAL

Abstract

Majorana zero modes, the fundamental building blocks of topologically protected qubits, can be realized in semiconductor-superconductor hybrid systems. Two-dimensional electron gases (2DEGs) with strong spin-orbit coupling offer a scalable platform for Majorana devices. Here, we investigate a new 2D hybrid system consisting of ternary InSbAs 2DEGs with epitaxially grown aluminum. Studying Josephson junctions in these systems allows us to estimate a large induced gap (200 μeV) and high interface transparencies (≈0.9). Furthermore, through weak anti-localization and quantum Hall measurements, we show that InSbAs has exceptionally strong spin-orbit interaction and a g-factor comparable to pure InSb. This unique combination of properties make InSbAs/Al 2DEGs a promising platform to study topological superconductivity.

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Presenters

  • Christian Moehle

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

Authors

  • Christian Moehle

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

  • Chung-Ting Ke

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

  • Candice Thomas

    Department of Physics and Astronomy and Station Q Purdue, Birck Nanotechnology Center, Purdue University, Microsoft Quantum at Station Q Purdue, Department of Physics and Astronomy and Birck Nanotechnology Center, Purdue University, Department of Physics and Astronomy and Station Q Purdue, Purdue University, Purdue University, Department of Physics and Astronomy and Microsoft Quantum Purdue, Purdue University, West Lafayette, Indiana 47907 USA

  • Mario Lodari

    QuTech and Kavli Institute of Nanoscience, Delft University of Technology

  • Giordano Scappucci

    Delft University of Technology, QuTech and Kavli Institute of Nanoscience, QuTech and Kavli Institute of Nanoscience, Delft University of Technology, QuTech, Delft University of Technology, Delft University of Technology, Delft, The Netherlands

  • Saurabh Karwal

    Netherlands Organization for Applied Scientific Research (TNO), QuTech and Netherlands Organization for Applied Scientific Research (TNO)

  • Sara Metti

    Purdue University, Department of Physics and Astronomy and Station Q Purdue, Purdue University

  • Charles R. Guinn

    Department of Physics and Astronomy and Station Q Purdue, Purdue University

  • Ray Kallaher

    Purdue University, Microsoft Quantum at Station Q Purdue, Purdue University

  • Geoffrey C. Gardner

    Department of Physics and Astronomy and Station Q Purdue, Birck Nanotechnology Center, Purdue University, Microsoft Quantum at Station Q Purdue, Materials Engineering, Purdue University, Purdue University, Microsoft Quantum at Station Q Purdue, Purdue University

  • Michael Manfra

    Physics and Astronomy, Purdue Univ, Department of Physics and Astronomy and Station Q Purdue, Birck Nanotechnology Center, School of Materials Engineering, School of Electrical and Computer Engineering, Purdue, Purdue Univ, Purdue University, Microsoft Quantum at Station Q Purdue, Department of Physics and Astronomy, Birck Nanotechnology Center, Microsoft Quantum Purdue, School og Materials Engineering & School of Electrical and Computer Engineering, P, Physics and Astronomy, Purdue University, Department of Physics and Astronomy and Station Q Purdue, Purdue University, Department of Physics and Astronomy and Microsoft Quantum Purdue, Purdue University, West Lafayette, Indiana 47907 USA, Department of Physics and Astronomy, PURDUE UNIVERSITY, Department of Physics and Astronomy, Microsoft Quantum Purdue, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA, Physics, Purdue University

  • Srijit Goswami

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