Large-band-gap non-Dirac quantum spin Hall states and strong Rashba effect in functionalized thallene films.

ABSTRACT: The quantum spin Hall state materials have recently attracted much attention owing to their potential applications in the design of spintronic devices. Based on density functional theory calculations and crystal field theory, we study electronic structures and topological properties of functionalized thallene films. Two different hydrogenation styles (Tl₂H and Tl₂H₂) are considered, which can drastically vary the electronic and topological behaviors of the thallene. Due to the C_3v symmetry of the two systems, the p_x and p_y orbitals at the Γ point have the non-Dirac band degeneracy. With spin-orbit coupling (SOC), topological nontrivial band gaps can be generated, giving rise to non-Dirac quantum spin Hall states in the two t

SUBMITTER: Liu X 

PROVIDER: S-EPMC10519994 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature