Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/6771
Title: Hydrogen-induced sp2-sp3 rehybridization in epitaxial silicene
Authors: Solonenko, Dmytro
Dzhagan, Volodymyr
Cahangirov, Seymur
Bacaksız, Cihan
Şahin, Hasan
Zahn, Dietrich R. T.
Vogt, Patrick
Keywords: Hydrogenation
Epitaxial silicene
Raman spectroscopy
Publisher: American Physical Society
Source: Solonenko, D., Dzhagan, V., Cahangirov, S., Bacaksız, C., Şahin, H., Zahn, D. R. T., and Vogt, P. (2017). Hydrogen-induced sp2-sp3 rehybridization in epitaxial silicene. Physical Review B, 96(23). doi:10.1103/PhysRevB.96.235423
Abstract: We report on the hydrogenation of (3×3)/(4×4) silicene epitaxially grown on Ag(111) studied by in situ Raman spectroscopy and state-of-the-art ab initio calculations. Our results demonstrate that hydrogenation of (3×3)/(4×4) silicene leads to the formation of two different atomic structures which exhibit distinct spectral vibrational modes. Raman selection rules clearly show that the Si atoms undergo a rehybridization in both cases from a mixed sp2-sp3 to a dominating sp3 state increasing the distance between the two silicene sublattices. This results in a softening of the in-plane and a stiffening of the out-of-plane phonon modes. Nevertheless, hydrogenated epitaxial silicene retains a two-dimensional nature and hence can be considered as epitaxial silicane. The level of hydrogenation can be determined by the intensity ratio of the Raman modes with different symmetries.
URI: http://doi.org/10.1103/PhysRevB.96.235423
http://hdl.handle.net/11147/6771
ISSN: 2469-9950
2469-9950
2469-9969
Appears in Collections:Photonics / Fotonik
Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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