報告題目: Fractional charge andbulk-disclination correspondence
報告人:蔣建華 教授
主持人:段純剛 教授
時間:11月10日下午14:00
地點:閔行校區(qū)物理樓226報告廳
報告人簡介:
中國科學技術大學本科(2004年)、碩博連讀博士(2010年)。先后在以色列Weizmann研究所和加拿大多倫多大學從事博士后研究。2015年起任蘇州大學物理學院教授。發(fā)表 70余篇同行評審學術論文(含Nature, Nature Physics, PRL等)。擔任“全國統(tǒng)計物理與復雜系統(tǒng)新葡的京集團3512vip”學術委員會委員,“全國超材料大會”理事會理事,《ChinesePhysics Letter》,《Chines PhysicsB》,《中國物理學報》和《物理》雜志青年編輯等學術兼職。
報告摘要:
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.