Spin-Orbit Protection of Induced Superconductivity in Majorana Nanowires

Journal article (2019)

Authors

J.D.S. Bommer QuTech Advanced Research Centre, QRD/Kouwenhoven Lab - QuTech Advanced Research Centre , Kavli institute of nanoscience Delft
Hao Zhang Tsinghua University, Kavli institute of nanoscience Delft, Student
Leo P. Kouwenhoven QN/Kouwenhoven Lab - AS , Microsoft Quantum Lab Delft, QuTech Advanced Research Centre, QRD/Kouwenhoven Lab - QuTech Advanced Research Centre , Kavli institute of nanoscience Delft
Önder Gül QRD/Kouwenhoven Lab - QuTech Advanced Research Centre , QuTech Advanced Research Centre, Kavli institute of nanoscience Delft
B. Nijholt QN/Akhmerov Group - AS , Kavli institute of nanoscience Delft
M.T. Wimmer QRD/Wimmer Group - QuTech Advanced Research Centre , Kavli institute of nanoscience Delft, QuTech Advanced Research Centre
Filipp N. Rybakov KTH Royal Institute of Technology
Julien Garaud Université Tours
D Car Eindhoven University of Technology
Sébastien R. Plissard Eindhoven University of Technology
E.P.A.M. Bakkers Kavli institute of nanoscience Delft, QuTech Advanced Research Centre, Eindhoven University of Technology, QN/Bakkers Lab
Research Group
QRD/Kouwenhoven Lab (QuTech Advanced Research Centre) (TU Delft)
Copyright: © 2019 J.D.S. Bommer, Hao Zhang, Önder Gül, B. Nijholt, M.T. Wimmer, Filipp N. Rybakov, Julien Garaud, Diana Car, Sébastien R. Plissard, E.P.A.M. Bakkers, Leo P. Kouwenhoven
DOI: https://doi.org/10.1103/PhysRevLett.122.187702
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Published Date

2019

Language

English

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Faculty

QuTech Advanced Research Centre

Department

Qubit Research Division

Research Group

QRD/Kouwenhoven Lab

Abstract

Spin-orbit interaction (SOI) plays a key role in creating Majorana zero modes in semiconductor nanowires proximity coupled to a superconductor. We track the evolution of the induced superconducting gap in InSb nanowires coupled to a NbTiN superconductor in a large range of magnetic field strengths and orientations. Based on realistic simulations of our devices, we reveal SOI with a strength of 0.15-0.35 eV Å. Our approach identifies the direction of the spin-orbit field, which is strongly affected by the superconductor geometry and electrostatic gates.

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