s p 2 -like hybridization of silicon valence orbitals in silicene nanoribbons

Applied Physics Letters - Tập 98 Số 8 - 2011
Paola De Padova1, C. Quaresima1, Bruno Olivieri2, P. Perfetti1, G. Le Lay3
1Consiglio Nazionale delle Ricerche-ISM 1 , via del Fosso del Cavaliere, 00133 Roma, Italy
2Consiglio Nazionale delle Ricerche-ISAC 2 , via Fosso del Cavaliere, 00133 Roma, Italy
3CINaM-CNRS 3 , Campus de Luminy, Case 913, 13288 Marseille Cedex 9, France

Tóm tắt

Silicene nanoribbons grown on a silver (110) substrate have been studied by reflection electron energy loss spectroscopy as a function of the electron beam incidence angle α. The spectra, taken at the Si K absorption edge (1.840 keV), reveal the presence of two distinct loss structures attributed to transitions 1s→π∗ and 1s→σ∗, according to their intensity dependence on α. Such behavior, when compared to graphite, attests the sp2-like hybridization of the silicon valence orbitals in the silicene nanoribbons as is, indeed, for carbon atomic bonds of graphene.

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Applied Physics Letters

Tập 98 Số 8

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