Fan Yang, Yue Ding, Fanming Qu, Jie Shen, Jun Chen, Zhongchao Wei, Zhongqing Ji, Guangtong Liu, Jie Fan, Changli Yang, Tao Xiang, Li Lu
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.
View original:
http://arxiv.org/abs/1105.0229
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