Spin-Orbit Protection of Induced Superconductivity in Majorana Nanowires

Jouri Bommer 1 Hao Zhang 2 Önder Gül 1 Bas Nijholt Michael Wimmer 3 Filipp Rybakov Julien Garaud 4 Donjan Rodic Egor Babaev Matthias Troyer 5 Diana Car 6 S.R. Plissard 7 Erik Bakkers Kenji Watanabe Takashi Taniguchi Leo Kouwenhoven
1 TU Delft - Delft University of Technology
2 Henan Agriculture University
3 The Institute of Computer Graphics and Algorithms / TU WIEN
4 IDP - Institut Denis Poisson
5 ITP - Theoretische Physik
6 TU/e - Eindhoven University of Technology [Eindhoven]
7 LAAS-MPN - Équipe Matériaux et Procédés pour la Nanoélectronique
LAAS - Laboratoire d'analyse et d'architecture des systèmes
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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https://hal.laas.fr/hal-02332269
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Submitted on : Thursday, October 24, 2019 - 4:53:56 PM
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LAAS | UNIV-TLSE3 | UT1-CAPITOLE | CNRS | LAAS-MPN | UNIV-TLSE2 | UNIV-ORLEANS | INSA-TOULOUSE | IDP | LAAS-MICRO-NANO-BIO-TECHNOLOGIES | INSA-GROUPE | UNIV-TOURS

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Jouri Bommer, Hao Zhang, Önder Gül, Bas Nijholt, Michael Wimmer, et al.. Spin-Orbit Protection of Induced Superconductivity in Majorana Nanowires. Physical Review Letters, American Physical Society, 2019, 122, ⟨10.1103/PhysRevLett.122.187702⟩. ⟨hal-02332269⟩

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