Proximity-effect-induced superconducting phase in the topological insulator BiSe
Authors:
- Fan YangFan Yang
- Fanming QuFQFanming Qu
- Jie ShenJSJie Shen
- Yue DingYDYue Ding
- Jun ChenJCJun Chen
- Zhongqing JiZJZhongqing Ji
- Guangtong LiuGLGuangtong Liu
- Jie FanJFJie Fan
- Changli YangCYChangli Yang
- Liang FuLFLiang Fu
- Li LuLLLi Lu
- 2 October 2012
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 86 (13)
Abstract
We have studied the electron transport properties of topological insulator-related material Bi2Se3 near the superconducting Pb-Bi2Se3 interface, and found that a superconducting state is induced over an extended volume in Bi2Se3. This state can carry a Josephson supercurrent, and demonstrates a gaplike structure in the conductance spectra as probed by a normal-metal electrode. The establishment of the gap is not by confining the electrons into a narrow space close to the superconductor-normal metal interface, as previously observed in other systems, but presumably via electron-electron attractive interaction in Bi2Se3.Keywords
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