Intrinsically topological second Chern insulator via synthetic dimensions  

作　　者：Seokwoo Kim Junsuk Rho 

机构地区：[1]Department of Mechanical Engineering,Pohang University of Science and Technology(POSTECH),South Korea [2]Department of Chemical Engineering,Pohang University of Science and Technology(POSTECH),South Korea [3]Department of Electrical Engineering,Pohang University of Science and Technology(POSTECH),South Korea

出　　处：《National Science Review》2024年第6期79-80,共2页国家科学评论（英文版）

摘　　要：Topology,an invariant quantity under continuous deformation,has significantly expanded our understanding of the phases of matter over recent decades.This concept,extending from quantum mechanics to classical wave platforms,prompts us to consider the interplay between various symmetry operations and the physical boundaries of lattices.In crystal bulk bands,non-trivial topology ensures the existence of local boundary modes that are protected by global symmetry,a principle known as bulk-boundary correspondence.For instance,the Chern insulator exhibits unidirectional chiral edge states,as its bulk bands become twisted evident in a nonzero Chern number defined in 2D momentum space.

关 键 词：SYMMETRY BANDS INSULATOR 

分 类 号：O469[理学—凝聚态物理] TB302[理学—电子物理学]