讲座题目：Topological phenomena at topological defects

时间：2022年11月1日上午10:30-12:00

地点：呈贡校区新奥京娱乐3514会议室

内容简介

There are two prominent applications of the mathematical concept of topology to the physics of materials: band topology, which classifies different topological insulators and semimetals, and topological defects that represent immutable deviations of a solid lattice from its ideal crystalline form. While these two classes of topological phenomena have generally been treated separately, recent experimental advancements have begun to probe their intricate and surprising interactions, in real materials as well as synthetic metamaterials. Topological lattice defects in topological materials offer a platform to explore a diverse range of novel phenomena, such as robust bound states and fractional charges, topological Wannier cycles, chiral and gravitational anomalies, topological lasers, and topological-defect-induced pumping and non-Hermitian skin effects. In this Perspective, we survey the developments in this rapidly moving field from both theoretical and experimental perspectives, with an emphasis on the latter. We also give an outlook on the potential impact of these phenomena on condensed matter physics, photonics, acoustics, and materials science.

讲座专家简介

蒋建华，苏州大学教授。2000-2010年在中国科学技术大学学习，获得学士和博士学位。2010-2012年在以色列Weizmann研究所凝聚态物理系从事博士后研究。2013-2015年在加拿大多伦多大学物理系从事博士后研究。2015年起任苏州大学教授。2021年担任苏州大学理论与应用物理研究所所长。2018年获得江苏特聘教授项目资助。入选2019年批次教育部国家级青年人才项目。2021年获得国家杰出青年基金项目资助。主要从事拓扑光子学和声子学、量子和非平衡统计物理、非常规热电效应的研究。创新发展了利用室温光子和声子系统实现新颖拓扑物理现象的研究，特别在拓扑体-缺陷对应关系、高阶拓扑物质态、非阿贝尔拓扑态等方面做出了一系列享有国际声誉的工作，为拓扑光子学和拓扑声子学的发展做出了重要的贡献，并在非平衡统计物理和非常规热电效应研究方面做了一系列基础性、开拓性的工作。在国际和全国会议上作大会和邀请报告共三十几次。发表同行评审学术论文100余篇，其中通讯作者论文含Nature, Nature Physics, Nature Materials, Phys. Rev. Lett., Phys. Rev. X等。