Regensburg 2007 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

O: Fachverband Oberflächenphysik

O 44: Poster Session II (Semiconductors; Oxides and Insulators: Adsorption, Clean Surfaces, Epitaxy and Growth; Surface Chemical Reactions and Heterogeneous Catalysis; Surface or Interface Magnetism; Solid-Liquid Interfaces; Organic, Polymeric, Biomolecular Films; Particles and Clusters; Methods: Atomic and Electronic Structure; Time-resolved Spectroscopies)

O 44.40: Poster

Mittwoch, 28. März 2007, 17:00–19:30, Poster C

Experimental band structure of V₂O₅ by angle resolved photoelectron spectroscopy — •Torsten Stemmler, Maximilian Kauert, Helmut Dwelk, and Recardo Manzke — Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, 12489 Berlin

Due to the manifold of catalytic applications, the vanadium oxides, and among them V₂O₅, came into the scientific focus. For a basic understanding a detailed knowledge of the electronic structure is important. In particulare because the experimental data base on the electronic valence band structure on V₂O₅(010) single crystals is very scarce. Here we present high-resolution angle-resolved photoemission experiments carried out with synchrotron radiation and with the light of a HeI resonance lamp. The results will be compared with theoretical calculations,e.g. from J.C.Parker et al.[1] and A.Chakrabarti et al.[2]. Furthermore the problem of degradation of the surface due to the high reactivity will be discussed.

[1] J.C.Parker, D.J.Lam, Y.-N.Xu and W.YChing, Phys. Rev. B42, 5289 (1990)

[2] A.Chakrabarti, K.Hermann, R.Druzinic, M.Witko, M.Petersen and F.Wagner, Phys. Rev. B59, 10583 (1999)