Berlin 2008 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 93: Surface Chemical Reactions

O 93.10: Vortrag

Freitag, 29. Februar 2008, 12:30–12:45, MA 043

Electronic valence band structure of V₂O₅ — •Torsten Stemmler, Maximilian Kauert, Helmut Dwelk, and Recardo Manzke — Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, 12489 Berlin

We will present high-resolution ARPES measurements of V₂O₅ single crystals carried out with He I resonance lamp and synchrotron radiation. The obtained experimentally band structure will be compared with calculations, e.g.[1] and [2]. By varying the excitation energy we have utilized the ARPES techniques to study also the time and photon flux dependence of valence band changes. This problem of degradation of the surface due to the high reactivity will be discussed referring to the previous experimental work, e.g. [3] and [4].

[1] A.Chakrabarti et al., Phys. Rev. B59, 10583 (1999)

[2] V.Eyert et al., Phys. Rev. B57, 12727 (1998)

[3] S.Shin, Phys. Rev. B41, 4993 (1990

[4] Q.Wu, Chem. Phys. Let. 430, 309 (2006)