Fractional charge and bulk-disclination correspondence
蔣建華教授 蘇州大學物理科學與技術學院
報告摘要：
Perhaps, the most fundamental phenomenon in topological physics is the bulk-edge correspondence. Recent studies reveal that many topological crystalline materials such as higher-order topological insulators, however, do not exhibit bulk-edge correspondence and are hence difficult to identify in experiments. Here, we demonstrate that bulk-disclination correspondence, manifesting fractional charge at disclinations depending on the bull band topology, is a novel phenomenon which is useful in experimentally distinguish various topological crystalline phases. We create a photonic analog of topological crystalline insulators and measure the photonic fractional charge via the classical analog of the Purcell effect. Our study provides the first example of bulk-disclination correspondence and unveils a new horizon for the study of topological physics.
報告人介紹：
蔣建華教授，教育部青年長江學者，分别于2004年和2010年獲中國科學技術大學學士和博士學位。先後在以色列Weizmann研究所和加拿大多倫多大學從事博士後研究。2015年起任蘇州大學物理學院教授。發表 70餘篇同行評審學術論文（含Nature, Nature Physics, PRL等）。2020年入選教育部長江學者獎勵計劃青年項目。擔任“全國統計物理與複雜系統學術會議”學術委員會委員，“全國超材料大會”理事會理事，《Chinese Physics Letter》,《Chines Physics B》,《中國物理學報》和《物理》雜志青年編輯等學術兼職。
