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

Reeg, Christopher and Loss, Daniel and Klinovaja, Jelena. (2018) Proximity effect in a two-dimensional electron gas coupled to a thin superconducting layer. Beilstein Journal of Nanotechnology, 9. pp. 1263-1271.

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Official URL: https://edoc.unibas.ch/67792/

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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.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretical Nano/Quantum Physics (Klinovaja)
UniBasel Contributors:Klinovaja, Jelena
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Beilstein-Institut
ISSN:2190-4286
e-ISSN:2190-4286
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:06 Feb 2019 13:44
Deposited On:06 Feb 2019 13:44

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