Proximity effect in a two-dimensional electron gas coupled to a thin superconducting layer

Beilstein Journal of Nanotechnology
Christopher ReegJelena Klinovaja

Abstract

There have recently been several experiments studying induced superconductivity in semiconducting two-dimensional electron gases that are strongly coupled to thin superconducting layers, as well as probing possible topological phases supporting Majorana bound states in such setups. We show that a large band shift is induced in the semiconductor by the superconductor in this geometry, thus making it challenging to realize a topological phase. Additionally, we show that while increasing the thickness of the superconducting layer reduces the magnitude of the band shift, it also leads to a more significant renormalization of the semiconducting material parameters and does not reduce the challenge of tuning into a topological phase.

References

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Apr 3, 2012·Physical Review Letters·Doru SticletPascal Simon
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Sep 26, 2012·Physical Review Letters·Jelena KlinovajaDaniel Loss
Feb 2, 2013·Physical Review Letters·Jelena KlinovajaDaniel Loss
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Citations

Apr 13, 2019·Physical Review Letters·Yanick VolpezJelena Klinovaja
Nov 24, 2018·Physical Review Letters·Chen-Hsuan HsuDaniel Loss
Oct 2, 2019·Physical Review Letters·Oladunjoye A AwogaAnnica M Black-Schaffer
Oct 24, 2020·Physical Review Letters·Tamás Haidekker GalambosDaniel Loss

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