Various Nodal Lines in P6₃/mmc-type TiTe Topological Metal and its (001) Surface State.

ABSTRACT: Searching for existing topological materials is a hot topic in quantum and computational chemistry. This study uncovers P6₃/mmc type TiTe compound-an existing material-is a newly discovered topological metal that hosts the various type of nodal line states. Different nodal line states normally exhibit different properties; they may have their individual applications. We report that TiTe hosts I, II, and hybrid type nodal line (NL) states at its ground state without chemical doping and strain engineering effects. Specifically, two type I NLs, two hybrid-type NLs, and one Γ-centered type II NL can be found in the k_z = 0 plane. Moreover, the spin-orbit coupling induced gaps for these NLs are very small and within acceptable limits. The surface states of the TiTe (001) pl

SUBMITTER: Lin P 

PROVIDER: S-EPMC8510513 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature