报告题目：Theory of fractional Chern insulators in Hofstadter bands

报 告 人：程蒙教授，耶鲁大学物理系

报告时间：2018-06-28 15:00

报告地点：物理系理科楼C302

报告摘要：Motivated by recent experimental progress in fabricating superlattices in 2D heterostructures and observation of topological states in Moire patterned monolayer graphene, we develop a general theory for the symmetry-enriched structures in fractional Chern insulators in Hofstadter bands with higher Chern numbers. In particular, we show that the symmetry-enriched structures should be understood with enhanced lattice symmetries, and derive general constraints on possible topological orders in this system.