Dresden 2003 – wissenschaftliches Programm
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O: Oberflächenphysik
O 24: Postersitzung (Epitaxie und Wachstum, Oxide und Isolatoren, Elektronische Struktur, Oberfl
ächenreaktionen, Adsorption an Oberfl
ächen, Organische Dünnschichten)
O 24.53: Poster
Mittwoch, 26. März 2003, 14:30–17:30, P1
Adsorption geometry of sulfur on Ir(110)-c(2×4)6S — •Jörg Kröger1, Jens Kuntze1, Andrea Atrei2, Brunetto Cortigiani3, Ugo Bardi3, and Gianfranco Rovida3 — 1Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Uiversität zu Kiel, D-24098 Kiel, Germany — 2Dipartimento di Scienze e Tecnologie Chimiche, Università di Siena, I-53100 Siena, Italy — 3Dipartimento di Chimica, Università di Firenze, I-50129 Firenze, Italy
The adsorbate system Ir(110)-c(2×4)6S was investigated by X-ray photoelectron diffraction. As proposed by a previous structural model based on a scanning tunneling microscopy experiment, we find that sulfur atoms of this superstructure enter the second adsorption layer. However, the axis connecting the centers of first-layer and second-layer adatoms is not normal to Ir(110) as suggested by the existing structure model. Rather than this the axis is tilted by ≈ 8∘ with respect to the sample normal. We compare our experimental results with single and multiple scattering calculations.