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

Beilstein Journal of Nanotechnology

关键词: Majorana fermions;    mesoscopic physics;    proximity effect;    quantum computing;    topological superconductivity;   

DOI  :  10.3762/bjnano.9.118

学科分类：地球科学(综合)

来源: Beilstein - Institut zur Foerderung der Chemischen Wissenschaften

【 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.

【 授权许可】

CC BY