【直播】松湖论坛 | 上海交大贾金锋教授：In situ techniques for quantum materials

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此次报告由松山湖材料实验室科研项目管理部主办，于2021年02月04日10:00开始，授权蔻享学术进行网络直播。

主题：In situ techniques for quantum materials报告人：贾金锋单位：上海交通大学时间：2021年02月04日 10:00-11:30主办方：松山湖材料实验室科研项目管理部报告摘要

Recently, quantum materials are the hottest topic in condensed matter physics. As the samples become smaller and smaller, in situ characterizations become more and more important. By combining molecular beam epitaxy (MBE) with STM, ARPES and other techniques, in situ characterizations can be achieved. With atomic precision control of growth, MBE can provide clean and smooth surfaces for STM and ARPES to study. Meanwhile, STM, ARPES and in situ techniques can also provide enough information for MBE to eliminate much of the trial and error during growth, so that one can fabricate the structures that do not exist in nature or cannot be grown by other techniques. Therefore, this kind of combined system can do some unique work which cannot be done by separate instruments. 

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.

报告人介绍

贾金锋教授1987年本科毕业于北京大学物理系，1992年北京大学物理系获博士学位，现任上海交通大学讲席教授。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（第一获奖人）；2016年教育部自然科学一等奖，2013年全球华人物理学会“亚洲成就奖”，2011年国家自然科学二等奖（第一获奖人）；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（第三获奖人）；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。

“松湖论坛”“松湖论坛”由松山湖材料实验室举办，定位于搭建粤港澳大湾区学术交流国际品牌，主要针对材料科学及交叉领域前沿和热点科学问题，以前沿领域一流科学家为引领，带动国内外开展系列专题研讨的论坛活动。本论坛面向实验室及粤港澳大湾区各高等院校和科研机构，旨在增进材料科学的学科领域交流。

编辑：王茹茹

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