Supplementary Information, S1 and S2

S1: Orbital-projected band structure of pristine As monolayer showing contributions from (a) 4px, (b) 4py, and (c) 4pz orbitals. S2: Orbital-projected band structure of hydrogen-adsorbed As monolayer showing contributions from (a) 4px, (b) 4py, and (c) 4pz orbitals of As, and (d) 1s orbital of H.