A review of the growth and structures of silicene on Ag (111)
Wu Ke-Hui†a),b)
       
(a) High resolution STM image of the ( )R30° structure with periodic perfect areas surrounded by disordered areas. (b) The structure model proposed by Jamgotchian et al. , with a big unit cell (blue diamond) having a superstructure (adapted from Ref. [ 54 ]).