Discovery of a weak topological insulating state and van Hove singularity in triclinic RhBi₂.

ABSTRACT: Time reversal symmetric (TRS) invariant topological insulators (TIs) fullfil a paradigmatic role in the field of topological materials, standing at the origin of its development. Apart from TRS protected strong TIs, it was realized early on that more confounding weak topological insulators (WTI) exist. WTIs depend on translational symmetry and exhibit topological surface states only in certain directions making it significantly more difficult to match the experimental success of strong TIs. We here report on the discovery of a WTI state in RhBi₂ that belongs to the optimal space group P[Formula: see text], which is the only space group where symmetry indicated eigenvalues enumerate all possible invariants due to absence of additional constraining crystalline symmetries. Our ARPE

SUBMITTER: Lee K 

PROVIDER: S-EPMC7994551 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature