Structure of Silicene Grown on Ag(111)

Structure of Silicene Grown on Ag(111)

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...

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Veröffentlicht in:Applied physics express 2012-04, Vol.5 (4), p.045802-045802-3
Hauptverfasser: Lin, Chun-Liang, Arafune, Ryuichi, Kawahara, Kazuaki, Tsukahara, Noriyuki, Minamitani, Emi, Kim, Yousoo, Takagi, Noriaki, Kawai, Maki
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container_issue 4
container_start_page 045802
container_title Applied physics express
container_volume 5
creator Lin, Chun-Liang
Arafune, Ryuichi
Kawahara, Kazuaki
Tsukahara, Noriyuki
Minamitani, Emi
Kim, Yousoo
Takagi, Noriaki
Kawai, Maki
description 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 $4{\times}4$ and the other is $\sqrt{13}{\times}\sqrt{13}$ R13.9°. In the $4{\times}4$ structure, the honeycomb lattice remains with six atoms displaced vertically, whereas the $\sqrt{13}{\times}\sqrt{13}$ R13.9° takes the regularly buckled honeycomb geometry.
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