Evidence of Silicene in Honeycomb Structures of Silicon on Ag(111)

In the search for evidence of silicene, a two-dimensional honeycomb lattice of silicon, it is important to obtain a complete picture for the evolution of Si structures on Ag(111), which is believed to be the most suitable substrate for growth of silicene so far. In this work we report the finding an...

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Bibliographic Details
Published in:Nano letters 2012-07, Vol.12 (7), p.3507-3511
Main Authors: Feng, Baojie, Ding, Zijing, Meng, Sheng, Yao, Yugui, He, Xiaoyue, Cheng, Peng, Chen, Lan, Wu, Kehui
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electron states
Evolution
Exact sciences and technology
Mathematical analysis
Methods of electronic structure calculations
Monolayers
Multilayers
Nanostructure
Phases
Physics
Silicon
Silicon substrates
Superstructures
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Summary:In the search for evidence of silicene, a two-dimensional honeycomb lattice of silicon, it is important to obtain a complete picture for the evolution of Si structures on Ag(111), which is believed to be the most suitable substrate for growth of silicene so far. In this work we report the finding and evolution of several monolayer superstructures of silicon on Ag(111), depending on the coverage and temperature. Combined with first-principles calculations, the detailed structures of these phases have been illuminated. These structures were found to share common building blocks of silicon rings, and they evolve from a fragment of silicene to a complete monolayer silicene and multilayer silicene. Our results elucidate how silicene forms on Ag(111) surface and provides methods to synthesize high-quality and large-scale silicene.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl301047g