1998/04/17 by Е. В. Чулков, E. V. Chulkov, I. Sarria +4 · 7 citations
Materials Science · Physics and Astronomy · #Advanced Chemical Physics Studies #Electron and X-Ray Spectroscopy Techniques #Surface and Thin Film Phenomena #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.80.4947
published as Phys. Rev. Lett. 80, 4947 (1998) · 4 pages, 1 figure, to appear in Phys. Rev. Lett
arxiv created 1998/04/17 · openalex publication_date 1998/06/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The lifetime of image states, related to the coupling of surface electronic states with the solid substrate, has been recently determined for quantum numbers n\ensuremath≤6 on Cu(100) by using time-resolved two-photon photoemission in combination with the coherent excitation of several states [U. H"ofer et al., Science 277, 1480 (1997)]. We evaluate the lifetimes of image states on copper surfaces from the self-energy of the excited quasiparticle, which we compute within the GW approximation. Single-particle wave functions are obtained by solving the Schr"odinger equation with a realistic one-dimensional model potential, and the screened interaction is evaluated in the random-phase approximation. Our results are in agreement with experimentally determined decay times.