报告题目:Quantum materials under extreme conditions
报告时间:2024年11月28日(周四)15:30
报告地点:鼓楼校区唐仲英楼 B501
报 告 人:李世燕,复旦大学
摘 要:
Superconductors, spin liquids, and topological materials are typical quantum materials currently under intensive study. In this talk, I will present our investigation of these quantum materials in recent few years by putting them under extreme conditions, such as ultralow temperature, high magnetic field, high pressure, and ultrathin flake. By measuring the ultralow-temperature thermal conductivity, we may judge the superconducting gap structure of a novel superconductor and whether a frustrated quantum magnet has a spin liquid ground state. By measuring the quantum oscillation of the magnetoresistance under high field, we may reveal the Fermi surfaces of a topological semimetal and judge whether it is topologically nontrivial or not. By applying high pressure, we expect to induce superconductivity in a topological material, or tune a superconductor to get an exotic superconducting phase diagram. Finally, by studying the ultrathin flake of a quasi-two-dimensional quantum material, we can finely tune it to see the exotic phase transition and competition. I will also report our recent discovery of universal phonon thermal Hall effect in crystals.
报告人简介:
李世燕教授于1997年和2002年在中国科学技术大学获得学士和博士学位,之后在加拿大多伦多大学和舍布鲁克大学做博士后研究,2007年加入复旦大学,目前为复旦大学物理系谢希德特聘教授。他的研究兴趣是超导体、量子自旋液体、拓扑材料等量子材料,擅长极低温输运及热力学性质测量。已发表论文150余篇,包括PRL/PRX 24篇,Nature子刊8篇,PNAS 2篇,JACS 2篇,Nano Letters 2篇。他获得了2015年度马丁伍德中国物理科学奖,入选了上海市“东方学者”、基金委优青、教育部长江学者特聘教授。
主办:南京大学物理学院、江苏省物理学会
联系人:马小松,Xiaosong.Ma@nju.edu.cn