https://repositorio.ufba.br/handle/ri/8023
Tipo: | Artigo de Periódico |
Título: | Structure determination of Ag(111) by low-energy electron diffraction |
Título(s) alternativo(s): | Surface Science |
Autor(es): | Soares, E. A. Nascimento, Von B. Carvalho, V. E. de Castilho, Caio Mário Castro de Carvalho, A. V. de Toomes, R. Woodruff, D. P. |
Autor(es): | Soares, E. A. Nascimento, Von B. Carvalho, V. E. de Castilho, Caio Mário Castro de Carvalho, A. V. de Toomes, R. Woodruff, D. P. |
Abstract: | A quantitative structure determination of the Ag(111) clean surface has been performed using low-energy electron diffraction. Optimisation of the outermost layer spacings and vibrational amplitudes was achieved using two different dynamical scattering computational methods, one using the LEEDFIT code and the second exploiting a Simulated Annealing algorithm implemented on the conventional Van Hove/Tong code. The results obtained show that a bulk-terminated structural model describes the data best (Δd12=0.00±0.02 Å and Δd23=0.00±0.03 Å), and in particular, the analysis excludes a 2.5% contraction of the outermost layer spacing, which was recently reported on the basis of ion-scattering measurements. The LEED result of no contraction is consistent with prior results for the (111) face of several other fcc metals. |
Palavras-chave: | Silver Low-energy electron diffraction (LEED) Low-index single crystal surfaces Surface relaxation and reconstruction Surface structure, morphology roughness topography |
URI: | http://www.repositorio.ufba.br/ri/handle/ri/8023 |
Data do documento: | 1999 |
Aparece nas coleções: | Artigo Publicado em Periódico (FIS) |
Arquivo | Descrição | Tamanho | Formato | |
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Soares.pdf Restricted Access | 219,32 kB | Adobe PDF | Visualizar/Abrir Solicitar uma cópia |
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