主讲人：许东辉，重庆大学副教授
时 间：2023年11月24日 16：30
地 点：物电学院A栋OX1（一楼交流空间）
联系人：童庆军
讲座摘要：Topological phases with higher-order topology, as an extension of previously well-known topological phases of matter, have drawn great research interest in various fields of physics in very recent years. Higher-order topological phases host anomalous gapless boundary states (e.g., corner states and hinges states) which go beyond the celebrated bulk-boundary correspondence, a guiding principle in topological matter. Higher-order topology had been identified in both bulk gapped and gapless systems yet restricted to crystal structures. In this talk, I will first give a brief overview of the first-order and higher-order topoOX1logical phases of matter. Then I will present our recent works on higher-order topology in aperiodic quasicrystals where we discovered a new class of higher-order topological phases protected by forbidden rotational symmetries in a crystal, such as eightfold or twelvefold rotation symmetries. Next, I will discuss our recent studies of the realization of higher-order topological phases in twisted bilayer honeycomb magnets. Finally, I will talk about how to manipulate semimetals with higher-order topology by using circularly polarized light.
主讲人简介：许东辉，重庆大学副教授。2012年毕业于浙江大学获博士学位，2012-2016年先后在浙江大学、香港科技大学从事博士后研究工作，2016-2022年在湖北大学任副教授，2022年3月入职重庆大学。从事凝聚态理论研究，主要研究方向为：拓扑量子物态、非传统超导体和相互电子系统。在美国物理学会Physical Review Letters, Physical Review A/B期刊发表上述方向研究论文40余篇。
