Adsorbate-induced surface-phonon softening on Pt(111)
- 16 February 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 58 (7) , 694-697
- https://doi.org/10.1103/physrevlett.58.694
Abstract
Inelastic helium-scattering measurements have been used to investigate the influence of oxygen adsorption on the Pt(111) surface phonons. Oxygen was found to form a (1×1) overlayer with nearly unity coverage at elevated surface temperatures. Such an overlayer is shown to induce a remarkable softening of the Pt surface phonons, which is interpreted as a reduction in the Pt attractive interaction arising from sp-electron donation to the oxygen overlayer.Keywords
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