Berlin 2008 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 43: Poster Session II - MA 141/144 (Surface Spectroscopy on Kondo Systems; Frontiers of Surface Sensitive Electron Microscopy; Methods: Scanning Probe Techniques+Electronic Structure Theory+Other; Time-Resolved Spectroscopy of Surface Dynamics with EUV and XUV Radiation; joined by SYNF posters)

O 43.36: Poster

Dienstag, 26. Februar 2008, 18:30–19:30, Poster F

Topology-dependent life-time of surface states — •Koray Köksal and Jamal Berakdar — Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Heinrich-Damerow-Str. 4, D-06120 Halle(Saale), Germany

On the ground of analytical and numerical calculations we show that the life time of surface states of noble metals can be tuned by the appropriate topology of surface. Results are presented for curved Cu(111) surface. We also discuss how the predicted effect can be realized experimentally and measured by means of scanning tunneling spectroscopy [1] and two-photon photoemission [2,3].

• [1] L. Limot, E. Pehlke, J. Kröger, and R. Berndt, Phys. Rev. Lett. 94, 036805 (2005)
• [2] R. W. Schoenlein, J. G. Fujimoto, G. L. Eesley, and T. W. Capehart, Phys. Rev. Lett. 61, 2596 (1988)
• [3] A. Winkelmann, F. Bisio, R. Ocaña, W.-C. Lin, M. Nývlt, H. Petek, and J. Kirschner, Phys. Rev. Lett. 98, 226601 (2007)