Spin-Orbit Protection of Induced Superconductivity in Majorana Nanowires

Journal article (2019)

Authors

J.D.S. Bommer Kavli institute of nanoscience Delft, QRD/Kouwenhoven Lab - QuTech Advanced Research Centre , QuTech Advanced Research Centre
Hao Zhang Tsinghua University, Kavli institute of nanoscience Delft, Student
Leo P. Kouwenhoven QuTech Advanced Research Centre, Microsoft Quantum Lab Delft, QRD/Kouwenhoven Lab - QuTech Advanced Research Centre , QN/Kouwenhoven Lab - AS , Kavli institute of nanoscience Delft
Önder Gül Kavli institute of nanoscience Delft, QRD/Kouwenhoven Lab - QuTech Advanced Research Centre , QuTech Advanced Research Centre
B. Nijholt Kavli institute of nanoscience Delft, QN/Akhmerov Group - AS
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
Diana Car Eindhoven University of Technology
Sébastien R. Plissard Eindhoven University of Technology
E.P.A.M. Bakkers QuTech Advanced Research Centre, Kavli institute of nanoscience Delft, 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.