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arXiv · 1511.05704

Topological Node-Line Semimetal in Compressed Black Phosphorus

Jianzhou Zhao·Rui Yu·Hongming Weng·Zhong Fang
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Abstract

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.

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Jianzhou Zhao, Rui Yu, Hongming Weng, Zhong Fang. 2015-11-18. Topological Node-Line Semimetal in Compressed Black Phosphorus. https://doi.org/10.1103/physrevb.94.195104

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