报告题目：Proximity Effect Induced Topological Superconductor and Signature of Majorana Modes

报 告 人：贾金锋，上海交通大学物理系

报告时间：5月16日（周四）16：00

报告地点：理科楼郑裕彤讲堂

报告摘要：Topological superconductors (TSCs) have attracted a great deal of attention recently because of the Majorana modes they host, which can be used in fault-tolerant quantum computation relying on their non-Abelian braiding statistics. While TSCs are very rare in nature, it has been proposed that an alternative way to realize them is by inducing superconductivity in the surface states of a topological insulator (TI) through the proximity effect (PE). Here we report the first experimental evidence for PE induced TSC in Bi2Te3/NbSe2 and the observation of Abrikosov vortices and core states. In particular, we found unusual splitting behavior in the zero-bias peak of the core states that may be attributed to the formation of Majorana fermions. Our work demonstrates the promise of using proximity effect induced TSC for realizing topological quantum computing.

In cooperation with Jin-Peng Xu, Mei-Xiao Wang, Jian-Feng Ge, Zhi Long Liu, Ying Liu, Xiaojun Yang, Zhu An Xu, Chun Lei Gao, Dong Qian, Canhua Liu, and Qi-Kun Xue.