Surface effects on the electronic energy loss of charged particles entering a metal surface

Details Surface effects on the electronic energy loss of charged particles entering a metal surface Surface effects on the electronic energy loss of charged particles entering a metal surface

2002-11-14

arxiv.org/abs/cond-mat/0211289v1

J. Electron Spectrosc. 129, 223 (2003)

Physics

Condensed Matter

Materials Science

7 pages, 3 figures, to appear in J. Electron Spectrosc

Scientific paper

Surface effects on the electronic energy loss of charged particles entering a metal surface are investigated within linear-response theory, in the framework of time-dependent density functional theory. Interesting phenomena occur in the loss spectra originated by the boundary (bregenzung) effect, which is as a consequence of the orthogonality of surface and bulk excitation modes. Our calculations indicate that the presence of a non-abrupt electron-density profile at the surface severely affects the nature of surface excitations, as deduced from comparison with simplified models.

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