报告题目:Topological Semimetals with Kagome Lattices
报告人:雷和畅
报告时间:2021年6月2日(周三)下午4:00
报告地点:理A110
摘要:
Kagome lattices host nontrivial topological band structures, like Dirac node, flat band and saddle point. On the other hand, the kagome lattice is known to host frustrated magnetism. In this presentation, I will introduce several kinds of materials, such as Fe3Sn2, Co3Sn2S2, YMn6Sn6 with kagome lattices, which show large anomalous and topological Hall effect, and it can be ascribed to the existence of Weyl or Dirac fermions in these systems as well as the real-space spin texture. I will also show introduce our recent work on AV3Sb5 (A = Rb and Cs), which exhibits a coexistence of charge density wave and superconductivity. These results indicate that kagome metals provide a new platform to study on the emergent topological electronic properties in a correlated electron system.
个人简介:
雷和畅,2009年毕业于中国科学院合肥物质科学研究院固体物理研究所,获得凝聚态物理学博士学位。2009-2012年,在美国布鲁克海文国家实验室Cedomir Petrovic研究组开展博士后研究。2012年-2014年,在日本东京工业大学Hideo Hosono研究组继续从事博士后研究。2014年底回国,在中国人民大学物理系任职,主要从事实验凝聚态物理研究,包括拓扑量子材料、新型超导材料和低维磁性材料的探索制备、晶体生长和物性研究等。目前,在《Nature》、《Nat. Phys.》《Nat. Commun.》、《Phys. Rev. Lett.》、《Phys. Rev. X》、《J. Am. Chem. Soc.》等期刊上发表研究论文180余篇,至今这些论文被引4000多次。2018年获得基金委优秀青年基金项目资助。
邀请人:许晓峰

