Optimizing the topological properties of semiconductor-ferromagnet-superconductor heterostructures

Journal article (2022)

Authors

Chun Xiao Liu External organisation
M.T. Wimmer QN/Wimmer Group - AS , Kavli institute of nanoscience Delft
Research Group
QN/Wimmer Group (AS) (TU Delft)
Copyright: © 2022 Chun Xiao Liu, M.T. Wimmer
DOI
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https://doi.org/10.1103/PhysRevB.105.224502
More Info
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Published Date

2022

Language

English

Reuse Rights

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Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/Wimmer Group

Abstract

We study the electronic properties of a planar semiconductor-superconductor heterostructure, in which a thin ferromagnetic insulator layer lies in between and acts as a spin filtering barrier. We find that in such a system one can simultaneously enhance the strengths of all the three important induced physical quantities, i.e., Rashba spin-orbit coupling, exchange coupling, and superconducting pairing potential, for the hybrid mode by external gating. Our results show the specific advantage of this stacked device geometry compared to conventional devices. We further discuss how to optimize geometrical parameters for the heterostructure and complement our numerical simulations with analytic calculations.