This title appears in the Scientific Report : 2003 

Role of occupied d bands in the dynamics of excited electrons and holes in Ag
García-Lekue, A.
Pitarke, J. M. / Chulkov, E. V. / Liebsch, A. / Echenique, P. M.
Theorie I; IFF-TH-I
Physical review / B, 68 (2003) S. 045103
College Park, Md. APS 2003
045103
10.1103/PhysRevB.68.045103
Journal Article
Kondensierte Materie
Physical Review B 68
J
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Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.68.045103 in citations.
Please use the identifier: http://hdl.handle.net/2128/1361 in citations.
The role that occupied d bands play in the inelastic lifetime of bulk and surface states in Ag is investigated from the knowledge of the quasiparticle self-energy. In the case of bulk electrons, sp bands are taken to be free-electron-like. For surface states, the surface band structure of sp states is described with the use of a realistic one-dimensional Hamiltonian. The presence of occupied d states is considered in both cases by introducing a polarizable background. We obtain inelastic lifetimes of bulk electrons that are in good agreement with first-principles band-structure calculations. Our surface-state lifetime calculations indicate that the agreement with measured lifetimes of both crystal-induced and image-potential-induced surface states on Ag(100) and Ag(111) is considerably improved when the screening of d electrons is taken into account.