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arXiv · 1206.6178

Proximity-effect-induced superconductivity in topological insulator-related material Bi2Se3

Fan Yang·Fanming Qu·Jie Shen·Yue Ding·Jun Chen·Zhongqing Ji·Guangtong Liu·Jie Fan·Changli Yang·Liang Fu·Li Lu
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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 gap-like 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.

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Fan Yang, Fanming Qu, Jie Shen, Yue Ding, Jun Chen, Zhongqing Ji, Guangtong Liu, Jie Fan, Changli Yang, Liang Fu, Li Lu. 2012-06-27. Proximity-effect-induced superconductivity in topological insulator-related material Bi2Se3. https://arxiv.org/abs/1206.6178

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