Vibrational spectrum of vicinal surfaces

Carriço, Artur da Silva; Nogueira Junior, Edvaldo

Vibrational spectrum of vicinal surfaces

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dc.contributor.author	Carriço, Artur da Silva
dc.contributor.author	Nogueira Junior, Edvaldo
dc.date.accessioned	2020-03-30T19:50:06Z
dc.date.available	2020-03-30T19:50:06Z
dc.date.issued	1991-07
dc.description.abstract	The vibrational spectrum of FCC metal vicinal surfaces is obtained from displacement-displacement Green's functions. Results are presented for the Pt(332) surface. Surface spectral densities are calculated, in the neighbourhood of the surface, for selected directions in the Brillouin zone. The coherent surface vibrations contain features that reproduce the available experimental results and predict others that might be observable by He scattering. The dispersion relation of a high frequency surface mode is calculated. The surface mode frequency is shown to depend weakly on the wave-vector along high symmetry lines in the surface Brillouin zone. The polarization and local character of this mode are closely related. Near the Brillouin zone centre and also near the zone boundary it is strongly polarized perpendicularly to the surface and a sudden polarization change is seen when its frequency approaches the surface projection of the bulk spectrum.	pt_BR
dc.description.resumo	The vibrational spectrum of FCC metal vicinal surfaces is obtained from displacement-displacement Green's functions. Results are presented for the Pt(332) surface. Surface spectral densities are calculated, in the neighbourhood of the surface, for selected directions in the Brillouin zone. The coherent surface vibrations contain features that reproduce the available experimental results and predict others that might be observable by He scattering. The dispersion relation of a high frequency surface mode is calculated. The surface mode frequency is shown to depend weakly on the wave-vector along high symmetry lines in the surface Brillouin zone. The polarization and local character of this mode are closely related. Near the Brillouin zone centre and also near the zone boundary it is strongly polarized perpendicularly to the surface and a sudden polarization change is seen when its frequency approaches the surface projection of the bulk spectrum.	pt_BR
dc.identifier.citation	NOGUERIA JUNIOR, E.; CARRIÇO, Artur da Silva. Vibrational spectrum of vicinal surfaces. Solid State Communications, v. 79, p. 25-30, 1991. ISSN 0038-1098. DOI: https://doi.org/10.1016/0038-1098(91)90473-9. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/0038109891904739?via%3Dihub. Acesso em: 30/03/2020.	pt_BR
dc.identifier.doi	https://doi.org/10.1016/0038-1098(91)90473-9
dc.identifier.uri	https://repositorio.ufrn.br/jspui/handle/123456789/28686
dc.language	en	pt_BR
dc.publisher	Elsevier B.V.	pt_BR
dc.subject	Vibrational spectrum	pt_BR
dc.subject	Vicinal surfaces	pt_BR
dc.title	Vibrational spectrum of vicinal surfaces	pt_BR
dc.type	article	pt_BR