Proximity effect at superconducting Sn-Bi2Se3 interface
  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. 
Fan Yang, Yue Ding, Fanming Qu, Jie Shen, Jun Chen, Zhongchao Wei,   Zhongqing Ji, Guangtong Liu, Jie Fan, Changli Yang, Tao...
cond-mat.supr-con