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arXiv · 1105.0229

Proximity effect at superconducting Sn-Bi2Se3 interface

Fan Yang·Yue Ding·Fanming Qu·Jie Shen·Jun Chen·Zhongchao Wei·Zhongqing Ji·Guangtong Liu·Jie Fan·Changli Yang·Tao Xiang·Li Lu
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Abstract

We have investigated the conductance spectra of Sn-Bi2Se3 interface junctions down to 250 mK and in different magnetic fields. A number of conductance anomalies were observed below the superconducting transition temperature of Sn, including a small gap different from that of Sn, and a zero-bias conductance peak growing up at lower temperatures. We discussed the possible origins of the smaller gap and the zero-bias conductance peak. These phenomena support that a proximity-effect-induced chiral superconducting phase is formed at the interface between the superconducting Sn and the strong spin-orbit coupling material Bi2Se3.

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Fan Yang, Yue Ding, Fanming Qu, Jie Shen, Jun Chen, Zhongchao Wei, Zhongqing Ji, Guangtong Liu, Jie Fan, Changli Yang, Tao Xiang, Li Lu. 2012-02-20. Proximity effect at superconducting Sn-Bi2Se3 interface. https://doi.org/10.1103/physrevb.85.104508

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