<注：本视频仅用于学术交流，版权归报告人所有>

►【量子物质系列报告第7期】

题目：Fractional Chern Insulators in Topological Flat Bands

时间：2020年8月12日（周三）15:00-16:00

报告人：刘钊 浙江大学

摘要：Fractional quantum Hall (FQH) states are an epitome of phases of matter with intrinsic topological order. Conventional FQH states emerge in two-dimensional (2D) electron gas in a perpendicular magnetic field. However, in the past decade, it has been realized that FQH physics is not exclusive to such a continuum setup. There are lattice analogs of FQH states, dubbed as fractional Chern insulators (FCIs), emerging in 2D lattice models that possess isolated flat bands with nonzero Chern number. Compared with conventional FQH states, FCIs have the advantage that they occur at zero magnetic field and with gaps that are potentially significantly larger. In this talk, based on our recent works, I will introduce FCIs and their relation with conventional FQH states, numerical simulation of FCIs in microscopic models, and the promising realization of FCIs in realistic solid materials like graphene-based Moire superlattice.

报告人简介：刘钊，浙江大学物理学系青年研究员，2007年于南京大学获学士学位，2012年于中国科学院物理研究所获博士学位。2012—2018年先后在北京计算科学研究中心、美国普林斯顿大学、德国柏林自由大学从事博士后研究，2018年9月回国入职浙江大学。近年来的主要研究方向为物质的强关联拓扑有序相。