Superconducting proximity effect in a Rashba-Type surface state of Pb/Ge(111)

H. Huang; H. Toyama; L. V. Bondarenko; A. Y. Tupchaya; D. V. Gruznev; A. Takayama; R. Hobara; R. Akiyama; A. V. Zotov; A. A. Saranin; S. Hasegawa

doi:10.1088/1361-6668/ab8ffe

Superconducting proximity effect in a Rashba-Type surface state of Pb/Ge(111)

H. Huang^*, H. Toyama, L. V. Bondarenko, A. Y. Tupchaya, D. V. Gruznev, A. Takayama, R. Hobara, R. Akiyama, A. V. Zotov, A. A. Saranin, S. Hasegawa

^*Corresponding author for this work

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

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 in-situ 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 occurred at around 7 K and 3 K. 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 platform to understand the Rashba superconducting systems.

Original language	English
Article number	075007
Journal	Superconductor Science and Technology
Volume	33
Issue number	7
DOIs	https://doi.org/10.1088/1361-6668/ab8ffe
Publication status	Published - 2020 Jul

Keywords

Rashba effect
electrical transport
in situ measurement
superconductivity
superstructure
surface physics
two-dimensional system

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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title = "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 in-situ 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 occurred at around 7 K and 3 K. 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 platform to understand the Rashba superconducting systems.",

keywords = "Rashba effect, electrical transport, in situ measurement, superconductivity, superstructure, surface physics, two-dimensional system",

author = "H. Huang and H. Toyama and Bondarenko, {L. V.} and Tupchaya, {A. Y.} and Gruznev, {D. V.} and A. Takayama and R. Hobara and R. Akiyama and Zotov, {A. V.} and Saranin, {A. A.} and S. Hasegawa",

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doi = "10.1088/1361-6668/ab8ffe",

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AU - Huang, H.

AU - Toyama, H.

AU - Bondarenko, L. V.

AU - Tupchaya, A. Y.

AU - Gruznev, D. V.

AU - Takayama, A.

AU - Hobara, R.

AU - Akiyama, R.

AU - Zotov, A. V.

AU - Saranin, A. A.

AU - Hasegawa, S.

PY - 2020/7

Y1 - 2020/7

N2 - 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 in-situ 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 occurred at around 7 K and 3 K. 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 platform to understand the Rashba superconducting systems.

AB - 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 in-situ 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 occurred at around 7 K and 3 K. 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 platform to understand the Rashba superconducting systems.

KW - Rashba effect

KW - electrical transport

KW - in situ measurement

KW - superconductivity

KW - superstructure

KW - surface physics

KW - two-dimensional system

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JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

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ER -

Superconducting proximity effect in a Rashba-Type surface state of Pb/Ge(111)

Abstract

Keywords

ASJC Scopus subject areas

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