Synthesis of Multilayer Silicene on Si(111)√3 x √3-Ag



Publication Details

De Padova, P., Feng, H., Zhuang, J., Li, Z., Generosi, A., Paci, B., Ottaviani, C., Quaresima, C., Olivieri, B., Krawiec, M. & Du, Y. (2017). Synthesis of Multilayer Silicene on Si(111)√3 x √3-Ag. The Journal of Physical Chemistry C: Energy Conversion and Storage, Optical and Electronic Devices, Interfaces, Nanomaterials, and Hard Matter, 121 (48), 27182-27190.


The compelling experimental evidence of multilayer silicene synthesis on one monolayer of silver deposited on a silicon substrate, Si(111)√3 x √3-Ag, used as a template is reported. Auger electron spectroscopy, low-energy electron diffraction, scanning tunneling microscopy/spectroscopy, in situ Raman spectroscopy, and energy-dispersive in-plane X-ray diffraction were applied to achieve the fingerprints of √3 x √3 multilayer silicene. Density functional theory calculations provided the structural models of single, bilayer, and three-layer silicene on the Si(111)√3 x √3-Ag surface. Single-layer silicene retains its free-standing form. The structural models, which are consistent with the experimental findings, feature atomic structure substantially different from that of Si(111).

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