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A finite cluster approach to the electron-hole pair damping of the adsorbate vibration: CO adsorbed on Cu(100)

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Details

Original languageEnglish
Pages (from-to)173-181
Number of pages9
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume39
Issue numberC
DOIs
Publication statusPublished - 1986
Externally publishedYes
Publication typeA1 Journal article-refereed

Abstract

A finite cluster method is applied to describe the energy transfer from the adsorbate vibrations to the electron-hole pair excitations. For CO stretch vibration on Cu(100) surface a value of 0.5 meV is found for the consequent damping (corresponding to the lifetime of 1.3·10-12- s) in an agreement with a recently measured vibrational line width. The mechanism behind the electron-hole pair excitations is found to be charge oscillations between the molecular 2π{black star} resonance and the substrate, caused by the molecular vibration. Cluster size effects have been found to be negligible.