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光辉平台教授🧑🏽‍💼。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.