sp2-like hybridization of silicon valence orbitals in silicene nanoribbons

被引:122
作者
De Padova, Paola [1 ]
Quaresima, Claudio [1 ]
Olivieri, Bruno [2 ]
Perfetti, Paolo [1 ]
Le Lay, Guy [3 ]
机构
[1] Consiglio Nazl Ric ISM, I-00133 Rome, Italy
[2] Consiglio Nazl Ric ISAC, I-00133 Rome, Italy
[3] CINaM CNRS, F-13288 Marseille 9, France
关键词
ENERGY-LOSS SPECTRA; CARBON K-EDGE; ORIENTATION DEPENDENCE; GRAPHITE;
D O I
10.1063/1.3557073
中图分类号
O59 [应用物理学];
学科分类号
摘要
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 alpha. The spectra, taken at the Si K absorption edge (1.840 keV), reveal the presence of two distinct loss structures attributed to transitions 1s ->pi* and 1s ->sigma*, according to their intensity dependence on alpha. Such behavior, when compared to graphite, attests the sp(2)-like hybridization of the silicon valence orbitals in the silicene nanoribbons as is, indeed, for carbon atomic bonds of graphene. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3557073]
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页数:3
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