Topological materials discovery by large-order symmetry indicators.

ABSTRACT: Crystalline symmetries play an important role in the classification of band structures, and their richness leads to various topological crystalline phases. On the basis of our recently developed method for the efficient discovery of topological materials using symmetry indicators, we explore topological materials in five space groups ( S G s), which are diagnosed by large-order symmetry indicators (ℤ₈ and ℤ₁₂) and support the coexistence of several kinds of gapless boundary states in a single compound. We predict many candidate materials; some representatives include Pt₃Ge ( S G 140 ), graphite ( S G 194 ), XPt₃ ( S G 221 , X = Sn, Pb), Au₄Ti ( S G 87 ), and Ti₂Sn ( S G 194 ). As by-produ

SUBMITTER: Tang F 

PROVIDER: S-EPMC6408154 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature