萨本栋讲坛之115期
题 目:In situtechniques for quantum materials
主 讲人: 贾金锋 教授 (上海交通大学)
时间地点:2021年6月11日(周五)下午14:30,物理楼552
主讲人简介:贾金锋,上海交通大学讲席教授,主要研究拓扑超导及Majorana费米子,其它拓扑材料及新量子现象,国家杰出青年科学基金获得者、国家高层次人才。在SCI收录的杂志上发表文章270多篇,文章被引用14000多次,被选为2018、19、20年Highly cited research(Clarivate Analytics)。曾获2019年国家自然科学二等奖;2016年教育部自然科学一等奖,2013年全球华人物理与天文学会“亚洲成就奖”,2011年国家自然科学二等奖;2011年香港求是科技基金会“杰出科技成就集体奖”; 2004年国家自然科学二等奖;2003年北京市科学技术奖一等奖; 1997年国家教育委员会科技进步一等奖等重要奖项。
Abstract:In this talk, I will introduce several works done with the combined system to demonstrate the strong power of the combination. With help of STM, atomically flat Pb thin films, stanene etc. can be grown with MBE and studied with STM. In Pb films on Si(111), we found quantum well states (QWS) form due to the electronic confinement in the film normal direction and novel properties induced by QWS. We also found high quality topological insulator films can be grown with MBE. Standing waves and Landau levels were observed with low temperature STM and demonstrated the existing of the topological surface states and the prohibition of backward-scattering. Topological insulator/superconductor hetero structures are also fabricated for exploring Majorana fermions. Recently, a strain tunable topological semimetal to topological Insulator Transition is observed in Monolayer 1T’-WTe2.