Dresden 2009 – scientific programme

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O: Fachverband Oberflächenphysik

O 26: Nanostructures at surfaces: Dots, particles, clusters II (SPM)

O 26.6: Talk

Tuesday, March 24, 2009, 16:15–16:30, SCH A215

Linewidth of a Cesium Adatom Resonance on Ag(111) — •Martin Ziegler¹, Jörg Kröger¹, Richard Berndt¹, Andrei Borisov^2,3, and Jean-Pierre Gauyacq^2,3 — ¹Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany — ²CNRS, Laboratoire des Collisions Atomiques et Moléculaires, UMR 8625 , Bâtiment 351, 91405 Orsay Cedex, France — ³Université Paris-Sud, Laboratoire des Collisions Atomiques et Moléculaires, UMR 8625, Bâtiment 351, 91405 Orsay Cedex, France

Single Cs atoms adsorbed on Ag(111) induce a resonance appearing just below the threshold of the quasi-two-dimensional Shockley-type surface state continuum. Spectroscopic analysis using a cryogenic scanning tunneling microscope and theoretical modeling are used to identify the importance of the various contributions to the linewidth and to the decay of the resonance: resonant charge transfer, inelastic transitions, and adsorbate vibrations perpendicular to the surface. Financial support by the Deutsche Forschungsgemeinschaft through SFB668 is acknowledged.