Abundant topological phases in hydrogenated group-IV binary alloy compounds.

ABSTRACT: Based on the widely studied two-dimensional layered materials, new materials with unique properties can be acquired by stacking the layered materials with different styles. By using density-functional calculations and symmetry analysis, we here present a route to produce abundant topologically nontrivial electronic states in three-dimensional compounds made of stacked monolayer hydrogenated group-IV binary alloys. Triply degenerate point (TDP) semimetals and Dirac semimetals are found in the hydrogenated SnPb compounds with different stacking configurations. The TDP semimetal is characterized by two sets of near-Dirac TDPs, stemming from the inversion of the s (p _z ) and p _x,y bands from the Pb (and also Sn) atoms and protected by a C

SUBMITTER: Gao G 

PROVIDER: S-EPMC8697691 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature