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Andreev quantum dot chain in an InSb nanowire

ORAL

Abstract

We built a chain of quantum dots in a semiconductor nanowire to study the Kitaev model of a one dimensional topological superconductor. Three quantum dots are electrostatically confined in an InSb nanowire. Each dot is strongly coupled to a superconducting NbTiN electrode. We observe Andreev bound states in each of these quantum dots and study their magnetic field dependence with fields parallel to the nanowire axis. Having two normal contacts at the wire ends and three superconducting leads, we are able to perform non-local measurements. We study spatial separation of Andreev bound states in this three dots chain with various inter-dot coupling strengths. Our experiments may provide insights on non-locality of zero modes in Majorana wires.

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Presenters

  • Hao Wu

    University of Pittsburgh, Physics, Univ. of Pittsburgh

Authors

  • Hao Wu

    University of Pittsburgh, Physics, Univ. of Pittsburgh

  • Po Zhang

    University of Pittsburgh, Physics, Univ. of Pittsburgh

  • Jun Chen

    Univ of Pittsburgh, University of Pittsburgh

  • Sasa Gazibegovic

    Dept. of Physics, Technical University, Eindhoven, The Netherlands, Eindhoven University of Technology, Department of Applied Physics, Eindhoven University of Technology, Applied Physics, Eindhoven Univ. of Technology, TU Eindhoven

  • Roy Op het Veld

    Dept. of Physics, Technical University, Eindhoven, The Netherlands, Eindhoven University of Technology, Applied Physics, Eindhoven Univ. of Technology, TU Eindhoven, Department of Applied Physics, Eindhoven University of Technology

  • Ghada Badawy

    Dept. of Physics, Technical University, Eindhoven, The Netherlands, Eindhoven University of Technology, Department of Applied Physics, Eindhoven University of Technology, Applied Physics, Eindhoven Univ. of Technology, TU Eindhoven

  • Erik Bakkers

    Dept. of Physics, Technical University, Eindhoven, The Netherlands, Eindhoven University of Technology, Department of Applied Physics, Eindhoven University of Technology, Applied Physics, Eindhoven Univ. of Technology, TU Eindhoven, Applied Physics, Eindhoven University of Technology

  • Sergey M Frolov

    Dept. of Physics, Univ. of Pittsburgh, Pittsburgh, PA, USA, Univ of Pittsburgh, University of Pittsburgh, Physics, Univ. of Pittsburgh