Vibrational spectrum of vicinal surfaces.

Detalhes bibliográficos
Autor(a) principal: Carriço, Artur da Silva
Data de Publicação: 1991
Outros Autores: Nogueira Junior, Edvaldo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRN
Texto Completo: https://repositorio.ufrn.br/jspui/handle/123456789/28686
https://doi.org/10.1016/0038-1098(91)90473-9
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.
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spelling Carriço, Artur da SilvaNogueira Junior, Edvaldo2020-03-30T19:50:06Z2020-03-30T19:50:06Z1991-07NOGUERIA 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.https://repositorio.ufrn.br/jspui/handle/123456789/28686https://doi.org/10.1016/0038-1098(91)90473-9The 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.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.Elsevier B.V.Vibrational spectrumVicinal surfacesVibrational spectrum of vicinal surfaces.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNinfo:eu-repo/semantics/openAccessORIGINALVibrationalSpectrumOfVicinalSurfaces_1991.pdfVibrationalSpectrumOfVicinalSurfaces_1991.pdfapplication/pdf405342https://repositorio.ufrn.br/bitstream/123456789/28686/1/VibrationalSpectrumOfVicinalSurfaces_1991.pdfcb1c7254a9e28139aa27e9b7e279b60cMD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/28686/2/license.txte9597aa2854d128fd968be5edc8a28d9MD52TEXTVibrationalSpectrumOfVicinalSurfaces_1991.pdf.txtVibrationalSpectrumOfVicinalSurfaces_1991.pdf.txtExtracted texttext/plain19709https://repositorio.ufrn.br/bitstream/123456789/28686/3/VibrationalSpectrumOfVicinalSurfaces_1991.pdf.txtfd3bdd791cfe40406d51ee62e32ace50MD53THUMBNAILVibrationalSpectrumOfVicinalSurfaces_1991.pdf.jpgVibrationalSpectrumOfVicinalSurfaces_1991.pdf.jpgGenerated Thumbnailimage/jpeg2120https://repositorio.ufrn.br/bitstream/123456789/28686/4/VibrationalSpectrumOfVicinalSurfaces_1991.pdf.jpgecd9c8e0fd97167dd4dcadd33b4d549fMD54123456789/286862020-05-05 01:21:42.95oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2020-05-05T04:21:42Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.pt_BR.fl_str_mv Vibrational spectrum of vicinal surfaces.
title Vibrational spectrum of vicinal surfaces.
spellingShingle Vibrational spectrum of vicinal surfaces.
Carriço, Artur da Silva
Vibrational spectrum
Vicinal surfaces
title_short Vibrational spectrum of vicinal surfaces.
title_full Vibrational spectrum of vicinal surfaces.
title_fullStr Vibrational spectrum of vicinal surfaces.
title_full_unstemmed Vibrational spectrum of vicinal surfaces.
title_sort Vibrational spectrum of vicinal surfaces.
author Carriço, Artur da Silva
author_facet Carriço, Artur da Silva
Nogueira Junior, Edvaldo
author_role author
author2 Nogueira Junior, Edvaldo
author2_role author
dc.contributor.author.fl_str_mv Carriço, Artur da Silva
Nogueira Junior, Edvaldo
dc.subject.por.fl_str_mv Vibrational spectrum
Vicinal surfaces
topic Vibrational spectrum
Vicinal surfaces
description 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.
publishDate 1991
dc.date.issued.fl_str_mv 1991-07
dc.date.accessioned.fl_str_mv 2020-03-30T19:50:06Z
dc.date.available.fl_str_mv 2020-03-30T19:50:06Z
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dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.citation.fl_str_mv 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.
dc.identifier.uri.fl_str_mv https://repositorio.ufrn.br/jspui/handle/123456789/28686
dc.identifier.doi.none.fl_str_mv https://doi.org/10.1016/0038-1098(91)90473-9
identifier_str_mv 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.
url https://repositorio.ufrn.br/jspui/handle/123456789/28686
https://doi.org/10.1016/0038-1098(91)90473-9
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dc.publisher.none.fl_str_mv Elsevier B.V.
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