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.

–

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