Growth of silicene layers on Ag(111): unexpected effect of the substrate temperature

Details Growth of silicene layers on Ag(111): unexpected effect of the substrate temperature Growth of silicene layers on Ag(111): unexpected effect of the substrate temperature

2012-03-18

arxiv.org/abs/1203.3968v2

Physics

Condensed Matter

Materials Science

This manuscript has been withdrawn as it will soon be published on-line in the Journal of Physics: Condensed Matter

Scientific paper

The deposition of one silicon monolayer on the silver (111) substrate in the temperature range 150-300$^\circ$C, gives rise to a mix of (4$\times$4), ($2\sqrt{3}\times 2\sqrt{3}$)R30$^\circ$ and ($\sqrt{13}\times\sqrt{13}$)R13.9$^\circ$ superstructures which strongly depends on the substrate temperature. We deduced from a detailed analysis of the LEED patterns and the STM images that all these superstructures are given by a quasi identical silicon single layer with a honeycomb structure (i.e. a silicene-like layer) with different rotations relatively to the silver substrate. The STM images morphology are explained from the relative position of the silicon atoms relative to the silver atoms. A complete analysis of all possible rotations of the silicene layer predicts also a ($\sqrt{7}\times\sqrt{7}$)R19.1$^\circ$ superstructure which has not been observed so far.

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