Journal
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
Volume 9, Issue -, Pages 1263-1271Publisher
BEILSTEIN-INSTITUT
DOI: 10.3762/bjnano.9.118
Keywords
Majorana fermions; mesoscopic physics; proximity effect; quantum computing; topological superconductivity
Funding
- Swiss National Science Foundation
- NCCR QSIT
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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.
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