报告题目: 拓扑笼目磁体的热电输运和磁调控理论

主讲嘉宾: 卢海舟 南方科技大学

主持人: 李 武

时间：2022年12月08日周四15: 30

地点: 沧海校区致知楼706

报告摘要:

The Wiedemann-Franz law and Mott relation are textbook paradigms on the ratios of the thermal and thermoelectric to electrical conductivity, respectively. Deviations from them usually reveal intriguing phases of matter. The topological kagome magnets TbMn6Sn6 and Mn3Ge show confusingly opposite derivations in the Hall measurement. By theoretically considering the topological and disorder corrections, we find the dominance of the topological correction in the experiments.

The non-collinear antiferromagnet Mn3Sn have attracted extensive interests, because of its anti-ferromagnetic advantages of ultrafast spin dynamics and large anomalous Hall effect resulting from the Weyl fermion nature. However, the dynamics of its all-electrical control is not completely clear. We simulate the switching of Mn3Sn using a pure electric current and reveal the role of Mn3Sn itself in terms of current-induced intrinsic non-collinear spin-orbit torques, instead of the heavy metals in the previous works.

嘉宾简介:

卢海舟，2002年于兰州大学获得物理学学士学位，2007年于清华大学高等研究院获得物理学博士学位。2007年开始在香港大学做博士后研究，2012年转为研究助理教授，2015年加入南方科技大学，现在为讲席教授。主要从事凝聚态物理的研究，研究兴趣是拓扑物质等新物态中的电子输运等物性，已发表了100余篇论文。入选基金委杰出青年基金，教育部国家级人才，国家一流本科课程负责人，深圳自然科学一等奖，全球华人物理与天文学会亚洲成就奖等。