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Spin-orbit interaction in InSb double quantum dots characterized using dispersive gate sensing

ORAL

Abstract

We experimentally investigate the consequences of a strong spin orbit interaction in double quantum dot defined in an InSb nanowire. Utilizing dispersive gate sensing, we characterize the tunnel coupling and find the dispersive signal depends on electron charge parity as well as magnitude and direction of the external magnetic field. In particular, we identify the spin-orbit field direction for a number of interdot charge transitions involving different orbitals. We notice that the direction of spin-orbit field is similar for charge transitions corresponding to the same orbitals, but varies randomly between different orbitals, and generally is not perpendicular to the nanowire.

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Presenters

  • Lin Han

    Delft University of Technology, Drexel University, School of biomedical Engineering, QuTech and Kavli Institute of Nanoscience, Delft University of Technology, QuTech, Delft University of Technology

Authors

  • Lin Han

    Delft University of Technology, Drexel University, School of biomedical Engineering, QuTech and Kavli Institute of Nanoscience, Delft University of Technology, QuTech, Delft University of Technology

  • Michael Chan

    QuTech and Kavli Institute of Nanoscience, Delft University of Technology

  • Damaz De Jong

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

  • Christian Prosko

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

  • Kongyi Li

    Delft University of Technology, Microsoft Quantum Lab Delft

  • Ghada Badawy

    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

  • Leo Kouwenhoven

    Microsoft Quantum Lab Delft, Delft University of Technology, Delft University of Technology, Quantum Labs Delft, Microsoft, Microsoft Quantum Lab Delft, Quantum Lab Delft, Microsoft, Microsoft Corp

  • Jonne Koski

    Microsoft Quantum Lab Delft

  • Filip Malinowski

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

  • Wolfgang Pfaff

    University of Illinois at Urbana-Champaign, Department of Physics, University of Illinois Urbana-Champaign, University of Illinois Urbana-Champaign