Spin-Orbit Protection of Induced Superconductivity in Majorana Nanowires

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 a...

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Bibliographic Details
Published in:arXiv.org 2019-05
Main Authors: Bommer, Jouri D S, Zhang, Hao, Önder Gül, Nijholt, Bas, Wimmer, Michael, Rybakov, Filipp N, Garaud, Julien, Rodic, Donjan, Babaev, Egor, Troyer, Matthias, Car, Diana, Plissard, Sébastien R, Erik P A M Bakkers, Watanabe, Kenji, Taniguchi, Takashi, Kouwenhoven, Leo P
Format: Article
Language:English
Subjects:
Computation
Electron spin
Magnetic fields
Magnetic moments
Nanowires
Relativistic effects
Spin-orbit interactions
Superconductivity
Topology
Online Access:Get full text
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Summary: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\(\require{mediawiki-texvc}\AA\). Our approach identifies the direction of the spin-orbit field, which is strongly affected by the superconductor geometry and electrostatic gates.
ISSN:2331-8422
DOI:10.48550/arxiv.1807.01940