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arXiv · 2011.01933

Electrostatic effects and topological superconductivity in semiconductor-superconductor-magnetic insulator hybrid wires

Benjamin D. Woods·Tudor D. Stanescu
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Abstract

We investigate the impact of electrostatics on the proximity effect between a magnetic insulator and a semiconductor wire in semiconductor-superconductor-magnetic insulator hybrid structures. By performing self-consistent Schr$\ddot{\rm o}$dinger-Poisson calculations using an effective model of the hybrid system, we find that large effective Zeeman fields consistent with the emergence of topological superconductivity emerge within a large parameter window in wires with overlapping layers of magnetic insulator and superconductor, but not in non-overlapping structures. We show that this behavior is essentially the result of electrostatic effects determining the amplitude of the low-energy wave functions near the semiconductor-magnetic insulator interface.

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Benjamin D. Woods, Tudor D. Stanescu. 2020-11-03. Electrostatic effects and topological superconductivity in semiconductor-superconductor-magnetic insulator hybrid wires. https://doi.org/10.1103/physrevb.104.195433

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