Two-dimensional arsenic monolayer sheet predicted from first-principles*
Pu Chun-Yinga), Ye Xiao-Taob), Jiang Hua-Longa), Zhang Fei-Wuc),d), Lu Zhi-Wena), He Jun-Baoa), Zhou Da-Weia)†
       
(a) A 2 × 2 × 1 gray arsenic supercell, (b) perspective view of 2D arsenic sheet, (c) honeycomb-like structure.