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Lounis, A., Bouamama, L., Mokrani, A. & Ziane, A. (2023) Ab-initio study of SiF2 molecule adsorption on Si(001)-p(2 x 2) reconstructed surface. Solid State Commun. 368 115176.
Added by: Richard Baschera (2023-06-12 13:41:43) Last edited by: Richard Baschera (2023-06-12 13:47:48) |
| Type de référence: Article DOI: 10.1016/j.ssc.2023.115176 Numéro d'identification (ISBN etc.): 0038-1098 Clé BibTeX: Lounis2023 Voir tous les détails bibliographiques  |
Catégories: INTERNATIONAL, PMN Créateurs: Bouamama, Lounis, Mokrani, Ziane Collection: Solid State Commun. |
Consultations : 1/114
Indice de consultation : 7% Indice de popularité : 1.75% |
| Résumé |
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First-principles calculations are performed to investigate the relaxation and electronic properties of SiF2 molecule deposited on surface. The reconstructed Si(001)-p(2 x 2) surface, modeled using density func-tional theory method, forms the basis for our molecule adsorption study. Several adsorption configurations corresponding to different orientations of the molecule have been investigated. Both stable dissociative and non-dissociative adsorption are found. For the most stable configuration, the adsorption takes place without dissociation of the molecule whose silicon atom binds two atoms of the surface. The progressive decomposition process of SiF2 is also explored using the nudged elastic band (NEB) method. An important energy barrier is obtained for the SiF2 molecule decomposition as compared to that of the SiF molecule. This could explain the high percentage of the SiF2 volatile molecule observed experimentally during the fluoride plasma etching process on the specialIntscript surface.
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