Proximity effect in a two-dimensional electron gas coupled to a thin superconducting layer
| Autor: | Reeg, Christopher, Loss, Daniel, Klinovaja, Jelena |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Beilstein Journal of Nanotechnology 9, 1263 (2018) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.3762/bjnano.9.118 |
| Popis: | 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. Comment: Appearing in Beilstein Journal of Nanotechnology thematic series on "Topological Materials" |
| Databáze: | arXiv |
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