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學術報告    Superconducting materials hosting nontrivial topology


【報告題目】 Superconducting materials hosting nontrivial topology
【報 告 人】 Prof. Yanfeng Guo (郭艷峰)
              Department of Physical Science and Technology, ShanghaiTech University
【時 間】 2019-11-13     4:00 pm (Wedensday)
【地 點】 北園106報告廳

【報告摘要】

Topological superconductors have attracted tremendous interest for hosting Majorana bound states on their boundaries, which are potential in realizing quantum computations. One promising approach to engineer topological superconductors is to discovery superconductors with nontrivial topology in their electronic band structure. In this talk, I will introduce our recent work on exploration of such materials. Specifically, I will first talk about our high-pressure measurement on the topological nodal-line semimetal SrAs3, which induces a Lifshitz transition below 1 GPa and then superconductivity at 20.6 GPa associated with a structural phase transition. The new cubic SrAsphase is found to host not only superconductivity but also a topological crystalline insulator state. I then will introduce our recent high magnetic field magnetotransport measurement on the layered superconductor TaSe3, which reveals the existence of a strong topological insulator state.

?References:

[1] E. J. Cheng, et alarXiv:1910.02603.

[2] W. Xia, et al. under preparation.


【報告人簡介】

郭艷峰上海科技大學物質科學與技術學院研究員、終身制序列助理教授、博導、課題組長,上海市東方學者、浦江人才計劃獲得者。2008年碩博連讀畢業于中科院物理研究所;2008年至2012年日本國立材料研究所(NIMS)博士后;2012年至2015年牛津大學物理系博士后;2015年加入上科大任現職。長期從事新量子物質材料探索、高質量單晶生長及物理性質研究。已在Nature Materials, Nature Physics, Physical Review Letters, Journal of the American Chemical Society等學術期刊發表論文80多篇,總引用次數逾1700次。


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