Spin-Orbit Protection of Induced Superconductivity in Majorana Nanowires

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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Submitted on : Thursday, October 24, 2019 - 4:53:56 PM
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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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