We report the results of new photoemission experiments from a clean and hydrogen-covered W(111) surface. Symmetry-related polarization effects are used to discriminate the symmetry of the initial states. Through a careful analysis of angle-resolved energy distribution curves and angle-resolved constant final-state spectra we are able to locate several surface bands in the clean surface emission and the hydrogen-induced states in the spectra from the covered surface. The experimental data are compared with the outcomes of semiempirical linear combination of atomic orbitals calculations both for the clean surface and for the adsorbed one, assuming a chemisorption geometry with H atoms bridging metal atoms of different layers. The model used shows a good agreement with the experiment and indicates the possible mechanisms of hydrogen bonding on this surface.

W (111): angle-resolved photoemission from the clean and H2 - covered surface / F., Cerrina; J. R., Anderson; G. J., Lapeyre; Bisi, Olmes; CALANDRA BUONAURA, Carlo. - In: PHYSICAL REVIEW. B, CONDENSED MATTER. - ISSN 0163-1829. - STAMPA. - 25:(1982), pp. 4949-4961.

W (111): angle-resolved photoemission from the clean and H2 - covered surface

BISI, Olmes;CALANDRA BUONAURA, Carlo
1982

Abstract

We report the results of new photoemission experiments from a clean and hydrogen-covered W(111) surface. Symmetry-related polarization effects are used to discriminate the symmetry of the initial states. Through a careful analysis of angle-resolved energy distribution curves and angle-resolved constant final-state spectra we are able to locate several surface bands in the clean surface emission and the hydrogen-induced states in the spectra from the covered surface. The experimental data are compared with the outcomes of semiempirical linear combination of atomic orbitals calculations both for the clean surface and for the adsorbed one, assuming a chemisorption geometry with H atoms bridging metal atoms of different layers. The model used shows a good agreement with the experiment and indicates the possible mechanisms of hydrogen bonding on this surface.
1982
25
4949
4961
W (111): angle-resolved photoemission from the clean and H2 - covered surface / F., Cerrina; J. R., Anderson; G. J., Lapeyre; Bisi, Olmes; CALANDRA BUONAURA, Carlo. - In: PHYSICAL REVIEW. B, CONDENSED MATTER. - ISSN 0163-1829. - STAMPA. - 25:(1982), pp. 4949-4961.
F., Cerrina; J. R., Anderson; G. J., Lapeyre; Bisi, Olmes; CALANDRA BUONAURA, Carlo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/449337
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