Figure 2
From: Effects of Oxygen Adsorption on the Surface State of Epitaxial Silicene on Ag(111)
Energy vs. k dispersion measured by ARPES for (a) clean Ag(111) surface, (b) 4 × 4 silicene grown on Ag(111) along the Γ-MAg direction and (c) oxidized silicene on Ag(111) along the Γ-MAg direction, respectively. SSS in (a) and (b) denotes the Shockley surface state. HSB in (b) denotes the hybrid surface band. (d) Schematic diagram of the BZ for 4 × 4 silicene grown on Ag(111): red, blue and orange honeycomb structures correspond to free-standing (FS) silicene, Ag(111) and 4 × 4 silicene with respect to Ag(111) (or 3 × 3 silicene with respect to 1 × 1 silicene), respectively. (e) 4 × 4 silicene grown on Ag(111) along the Γ-KAg direction and (f) oxidized silicene on Ag(111) along the Γ-KAg direction, respectively.
