Kitaev model with quantum dot chains I: Andreev transport

ORAL  · Invited

Abstract

Chains of quantum dots in semiconductor nanowires can be used to emulate important one-dimensional Hamiltonians such as the topological p-wave superconductor. We build a coupled triple dot chain in an InSb nanowire where each dot is tuned to be strongly coupled to a superconducting NbTiN lead. We use an array of closely spaces bottom gates to tune the Andreev bound states in each dot and observe Andreev state hybridization. We measure transport through Andreev bound states on individual dots, dot pairs and through the triple dot. We explore the influence of Coulomb energy on the Andreev spectra of the chains.

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Authors

  • Zhaoen Su

    • University of Pittsburgh

  • Hao Wu

    • University of Pittsburgh

  • Moïra Hocevar

    • Institut Néel CNRS, 38042 Grenoble, France
    • Universite Grenoble Alpes; CNRS, Institut Neel

  • Diana Car

    • Eindhoven University of Technology, The Netherlands
    • Eindhoven University of Technology

  • Sebastien Plissard

    • LAAS CNRS, France
    • LAAS CNRS, Universite de Toulouse

  • Erik Bakkers

    • Eindhoven University of Technology, The Netherlands
    • Eindhoven University of Technology; Delft University of Technology

  • Sergey Frolov

    • Department of Physics and Astronomy, University of Pittsburgh
    • University of Pittsburgh