学术讲座
蒋建华:Fractional charge and bulk-disclination correspondence
发布时间:2020-11-05   浏览次数:10

报告题目: Fractional charge andbulk-disclination correspondence

报告人:蒋建华 教授

主持人:段纯刚 教授

时间:11月10日下午14:00

地点:闵行校区物理楼226报告厅

报告人简介

中国科学技术大学本科(2004年)、硕博连读博士(2010年)。先后在以色列Weizmann研究所和加拿大多伦多大学从事博士后研究。2015年起任苏州大学物理学院教授。发表 70余篇同行评审学术论文(含Nature, Nature Physics, PRL等)。担任“全国统计物理与复杂系统学术会议”学术委员会委员,“全国超材料大会”理事会理事,《ChinesePhysics Letter》,《Chines PhysicsB》,《中国物理学报》和《物理》杂志青年编辑等学术兼职。

报告摘要:

Perhaps, the most fundamentalphenomenon in topological physics is the bulk-edge correspondence. Recentstudies reveal that many topological crystalline materials such as higher-ordertopological insulators, however, do not exhibit bulk-edge correspondence andare hence difficult to identify in experiments. Here, we demonstrate thatbulk-disclination correspondence, manifesting fractional charge atdisclinations depending on the bull band topology, is a novel phenomenon whichis useful in experimentally distinguish various topological crystalline phases.We create a photonic analog of topological crystalline insulators and measurethe photonic fractional charge via the classical analog of the Purcell effect.Our study provides the first example of bulk-disclination correspondence andunveils a new horizon for the study of topological physics.