Defects in C(2×2) oxygen overlayers on Ni(100): The effect on vibrational spectra

Autor:	John C. Hemminger, Kathryn G. Lloyd, Barbara A. Banse
Rok vydání:	1987
Předmět:	Scattering General Physics and Astronomy chemistry.chemical_element Electron Inelastic scattering Oxygen Overlayer Nickel chemistry Vacancy defect Physics::Atomic and Molecular Clusters Physical and Theoretical Chemistry Atomic physics Vibrational spectra
Zdroj:	The Journal of Chemical Physics. 86:2986-2989
ISSN:	1089-7690 0021-9606
DOI:	10.1063/1.452052
Popis:	We have modeled vacancy defects in C(2×2) oxygen overlayers on Ni(100) to examine the effect which such vacancies have on the vibrational spectra as measured by inelastic scattering of low energy electrons (HREELS). Particular attention has been given to the change in frequency of the collective modes of the oxygen overlayer as a function of the wave vector of the mode. We find that this frequency dispersion is modified by the vacancies and that there are distinctive changes in the expected peak shapes as a function of the scattering geometry.
Databáze:	OpenAIRE
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