%0 Journal Article
%T Topological Node-Line Semimetal in Compressed Black Phosphorus
%A Jianzhou Zhao
%A Rui Yu
%A Hongming Weng
%A Zhong Fang
%J Physics
%D 2015
%I arXiv
%X Based on first-principles calculations and tight-binding model analysis, we propose that black phosphorus (BP) can host a three-dimensional topological node-line semimetal state under pressure when spin-orbit coupling (SOC) is ignored. A closed topological node line exists in the first Brillouin zone (BZ) near the Fermi energy, which is protected by the coexistence of time-reversal and spatial inversion symmetry with band inversion driven by pressure. Drumhead-like surface states have been obtained on the beard (100) surface. Due to the weak intrinsic SOC of phosphorus atom, a band gap less than 10 meV is opened along the node line in the presence of SOC and the surface states are almost unaffected by SOC.
%U http://arxiv.org/abs/1511.05704v1