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Proceedings Paper

Spin-orbit coupling and topological superconductivity in full-shell semiconductor-superconductor nanowires (Conference Presentation)
Author(s): Tudor Stanescu; Benjamin Woods

Paper Abstract

We study the electronic structure of full-shell superconductor-semiconductor nanowires, which have recently been proposed for creating Majorana zero modes, using an eight-band k p model within a fully self-consistent Schrödinger-Poisson scheme. We find that the spin-orbit coupling induced by the intrinsic radial electric field is generically weak for sub-bands with their minimum near the Fermi energy. Furthermore, we show that the chemical potential windows consistent with the emergence of a topological phase are small and sparse and can only be reached by fine tuning the diameter of the wire. These findings suggest that the parameter space consistent with the realization of a topological phase in full-shell InAs/Al nanowires is, at best, very narrow.

Paper Details

Date Published: 10 September 2019
Proc. SPIE 11090, Spintronics XII, 1109040 (10 September 2019); doi: 10.1117/12.2530023
Show Author Affiliations
Tudor Stanescu, West Virginia Univ. (United States)
Benjamin Woods, West Virginia Univ. (United States)

Published in SPIE Proceedings Vol. 11090:
Spintronics XII
Henri-Jean M. Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi, Editor(s)

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