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首页> 外文期刊>Beilstein Journal of Nanotechnology >Proximity effect in a two-dimensional electron gas coupled to a thin superconducting layer
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Proximity effect in a two-dimensional electron gas coupled to a thin superconducting layer

机译：耦合到薄超导层的二维电子气中的邻近效应

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摘要

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.
机译：最近有一些实验研究了与薄超导层强耦合的半导体二维电子气中的感应超导性，以及在这种设置中探测支持马里亚纳邦定态的拓扑相。我们表明，在这种几何形状中，超导体会在半导体中感应出大的带隙，因此难以实现拓扑相。此外，我们表明，虽然增加超导层的厚度会减小带隙的幅度，但也会导致半导体材料参数的更正态化，并且不会减少调整为拓扑相的难度。

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