Zero-Dimensional Interstitial Electron-Induced Spin-Orbit Coupling Dirac States in Sandwich Electride.

ABSTRACT: The development of inorganic electrides offers new possibilities for studying topological states due to the nonnuclear-binding properties displayed by interstitial electrons. Herein, a sandwich electride 2[CaCl]⁺:2e^- is designed, featuring a tetragonal lattice structure, including two atomic lattice layers and one interstitial electron layer. The interstitial electrons form nonsymmorphic-symmetry-protected Dirac points (DPs) at the X and M points, which are robust against the spin-orbit coupling effect. DPs exhibit an approximately elliptical shape, characterized by a relatively high anisotropy, resulting from the interplay between the electron and atomic layers. In addition, 2[CaCl]⁺:2e^- possesses a lower work function (WF) (3.43 eV), endowing i

SUBMITTER: Meng W 

PROVIDER: S-EPMC11935133 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature