Cálculo de espectros de fotoemissão por raios-x de íons adsorvidos em metais. / X-ray photoemission spectra calculation of ions adsorbed on metallic surfaces.

AUTOR(ES)
DATA DE PUBLICAÇÃO

1983

RESUMO

X-Ray Photoemission spectra (XPS) are calculated for a simple model for chemisorptions on metallic surfaces. In the spineless model, already discussed by other authors, the metal is represented by a half-filled conduction band and the adsorbed ion by two levels, one representative of a deep core state initially occupied by the photoelectron and the second, a resonant level, of an initially empty adsorbate orbital which, attracted by the core hole potential, is dragged below the Fermi energy. The calculation based on the renormalization group techniques devised by Wilson to analyze the Rondo problem, accounts for the first time for the electrostatic interaction between the core hole and the conduction states. The results show that this interaction effectively narrows the coupling between the resonant level and the conduction band and hence changes qualitatively the photoemission spectra.

ASSUNTO(S)

grupo de renormalização resonant level photoemission espectro de fotoemissão renormalization group nível ressonante

ACESSO AO ARTIGO

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