题 目：Exotic optical and topological transport phenomena in antiferromagnets
报告人：:梁纹豪 博士 香港科技大学
时 间：2025年12月25日(星期四)上午10:30
地 点：虎溪校区理科楼物理学院LE201
邀请人：曾俊杰
报告摘要：Antiferromagnets have attracted increasing interest in recent years due to their high value for fundamental research and applications. In this talk,I will present the nonreciprocal optical effect in antiferromagnets. It has very high requirements for the symmetry breaking of thesystem.We revealed the microscopic mechanism and geometric origin of the phenomena in two-dimensional antiferromagnets. The study of it can reflect the structure and electronic properties of the materials and improve our understanding of the coupling characteristics between electrons and the light field. In addition,I will present the Chern number tunable quantum anomalous Hall effect(QAHE) in compensated antiferromagnets without net magnetization, which breaks the traditional concept that QAHE must have magnetization. The layer-selective edge states andexotic transport properties provide solutions for the design of dissipationless electronic transport devices.
梁纹豪博士，2024年博士毕业于中国科学技术大学，导师为乔振华教授。其后进入香港科技大学做博士后研究，导师为K.T.Law教授。主要研究方向为凝聚态物质中的能带拓扑，光与物质相互作用的新奇现象与其中的量子几何，以及量子输运现象。迄今，以第一作者发表SCI论文3篇，包括2篇 PRL和 1篇 PRB。