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Electron-phonon interaction on the Al(001) surface

AuthorsSklyadneva, Irina Yu.; Chulkov, Eugene V. ; Echenique, Pedro M.
Line widths
Plane waves
Linear response theory
Density functional method
Surface electron state
Spectral functions
Surface phonons
Ab initio calculations
Electron-phonon interactions
Issue Date31-Mar-2008
PublisherInstitute of Physics Publishing
CitationJournal of Physics:Condensed Matter 20 165203 (2008).
AbstractWe report an ab initio study of the electron–phonon (e–ph) interaction and its contribution to the lifetime broadening of excited hole (electron) surface states on Al(001). The calculations based on density-functional theory were carried out using a linear response approach in the plane-wave pseudopotential representation. The obtained results show that both the electron–phonon coupling and the linewidth experience a weak variation with the energy and momentum position of a hole (electron) surface state in the energy band. An analysis of different contributions to the e–ph coupling reveals that bulk phonon modes turn out to be more involved in the scattering processes of excited electrons and holes than surface phonon modes. It is also shown that the role of the e–ph coupling in the broadening of the Rayleigh surface phonon mode is insignificant compared to anharmonic effects.
Description6 pages.
Publisher version (URL)http://dx.doi.org/10.1088/0953-8984/20/16/165203
Appears in Collections:(CFM) Artículos
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