2002/11/14 by A. Garcia-Lekue, J. M. Pitarke
Physics and Astronomy · #cond-mat.mtrl-sci
published as J. Electron Spectrosc. 129, 223 (2003) · 7 pages, 3 figures, to appear in J. Electron Spectrosc
arxiv created 2002/11/14 · arxiv updated 2009/11/30
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.