A review of the growth and structures of silicene on Ag (111)
Wu Ke-Hui†a), b) 
A review of the growth and structures of silicene on Ag (111) |
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Wu Ke-Hui†
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| (a) and (b) The STM images of the same area on R30° silicene taken at tip bias −2.0 V and 0.1 V, respectively, at 5 K. (c) The filtered high-resolution STM image with high contrast taken at 0.1 V. (d) and (e) Models of two energy-degenerated reconstructed structures of silicene sheet on Ag (111) surface with an orientation angle of θ = 30°, which are obtained from DFT. Color code: Blue, yellow, and red spheres denote Ag atoms, Si atoms in lower layer, and Si atoms in higher layer, respectively. The red triangles denote the units of silicene structures. (f) The interpolated potential energy curve for structural transition between the two the mirror-symmetric geometries on Ag (111). (g) The intermediate structure between the two rhombic structures of silicene shown in panels (d) and (e) (adapted from Ref. [ 30 ]). |
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