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Higher‐Order Topological Band Structures
Physica Status Solidi (B) - Basic Solid State Physics ( IF 1.5 ) Pub Date : 2020-08-12 , DOI: 10.1002/pssb.202000090
Luka Trifunovic 1 , Piet W. Brouwer 2
Affiliation  

The interplay of topology and symmetry in a material's band structure may result in various patterns of topological states of different dimensionality on the boundary of a crystal. The protection of these “higher‐order” boundary states comes from topology, with constraints imposed by symmetry. Herein, the bulk–boundary correspondence of topological crystalline band structures, which relates the topology of the bulk band structure to the pattern of the boundary states, is reviewed. Furthermore, recent advances in the K‐theoretic classification of topological crystalline band structures are discussed.

中文翻译:

高阶拓扑带结构

在材料的能带结构中,拓扑结构和对称性的相互作用可能导致在晶体边界上具有不同维数的拓扑状态的各种模式。这些“高阶”边界状态的保护来自拓扑结构,对称性强加了约束。在这里,审查了拓扑晶体带结构的体-边界对应关系,其将体带结构的拓扑结构与边界态的模式相关联。此外,讨论了拓扑晶体带结构的K理论分类的最新进展。
更新日期:2020-08-12
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