Superconducting proximity effect in a Rashba-type surface state of Pb/Ge(111)
Abstract
The Rashba superconductor, in which spin-splitting bands become superconducting, is fascinating as a novel superconducting system in low dimensional systems. Here, we present the results of transport measurements on a Rashba-type surface state of the striped incommensurate (SIC) phase of a Pb atomic layer on Ge(111) surface with additional Pb islands/clusters on it. We found that two-step superconducting transitions at around 7 K and 3 K occurred. The latter superconducting transition is suggested to be induced at the non-superconducting Rashba SIC area because of the lateral proximity effect caused by the superconducting Pb clusters. Our results propose a new type of Rashba superconductor, which is a new platform to understand the Rashba superconducting systems.
Keywords
Cite
@article{arxiv.1910.03760,
title = {Superconducting proximity effect in a Rashba-type surface state of Pb/Ge(111)},
author = {H. Huang and H. Toyama and L. V. Bondarenko and A. Y. Tupchaya and D. V. Gruznev and A. Takayama and R. Hobara and R. Akiyama and A. V. Zotov and A. A. Saranin and S. Hasegawa},
journal= {arXiv preprint arXiv:1910.03760},
year = {2020}
}