Chun-Liang Lin, R. Arafune, Kazuaki Kawahara, N. Tsukahara, E. Minamitani, Yousoo Kim, N. Takagi, M. Kawai
2012.3.28Applied Physics Express
tlooto Summary
Silicene's two-dimensional honeycomb sheet grown on Ag(111) has two atomic arrangements: 4×4 and √13×√13 R13.9°, with different lattice geometries.
Abstract
The structure of silicene, the two-dimensional honeycomb sheet of Si, grown on Ag(111) was investigated by scanning tunneling microscopy (STM) and low-energy electron diffraction (LEED) combined with density functional theory (DFT) calculation. Two atomic arrangements of honeycomb configuration were found by STM, which are confirmed by LEED and DFT calculations; one is 4×4 and the other is √13×√13 R13.9°. In the 4×4 structure, the honeycomb lattice remains with six atoms displaced vertically, whereas the √13×√13 R13.9° takes the regularly buckled honeycomb geometry.
Citation format
LIN, Chun-Liang, et al. Structure of silicene grown on ag(111). Applied Physics Express, 2012, 5: 045802.