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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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