Silicene: from monolayer to multilayer — A concise review
Li Hui†, Hui-Xia Fu, Meng Sheng
       
(a) STM image of 7H-hydrogenated 3×3 SLS/Ag (111). The white rhombus marks a unit cell of the structure. (b) Coexistence of 7H-hydrogenated (red cell) and 6H-hydrogenated (white cell) SLS. The structural models of (c) 6H-hydrogenated and (d) 7H-hydrogenated SLS from DFT optimizations; corresponding simulated STM images are shown in panels (e) and (f), respectively.[ 34 ]