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O: Fachverband Oberflächenphysik
O 36: Poster Session II (Metals; Nanostructures at surfaces; Surface or interface magnetism; Spin-Orbit Interaction at Surfaces; Electron and spin dynamics; Surface dynamics; Methods; Theory and computation of electronic structure)
O 36.99: Poster
Dienstag, 15. März 2011, 18:30–22:00, P4
Photo-induced melting of a Pb overlayer on Cu(111) observed with time- and angle-resolved XUV photoemission — •Andreas Ruffing1, Steffen Eich1, Adra V. Carr2, Daniel Steil1, Alexander Haßdenteufel1, Margaret M. Murnane2, Henry C. Kapteyn2, Michael Bauer3, Stefan Mathias1,2, and Martin Aeschlimann1 — 1Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, 67663 Kaiserslautern, Germany — 2JILA, University of Colorado and NIST, Colorado 80309 0440, USA — 3Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24908 Kiel, Germany
The electronic structure during a thermally induced melting transition was investigated by Baumberger et al. in 2004 [1]. Baumberger et al. found that the liquid film of Pb/Cu(111) shows electronic features as the persistence of a Fermi surface, the filling of band gaps, and the localization of the electron wave functions upon melting. In our experiment, we use intense femtosecond infrared pulses to photo-induce this melting transition of the Pb overlayer on Cu(111). We monitor the dynamical changes in the electronic structure as a function of time by using time- and angle-resolved XUV photoemission spectroscopy. XUV pulses are generated from high-harmonic upconversion, and are needed to access the Brillouin zone boundary, where the melting transition can be followed by a transient change of the electronic band structure.
Baumberger et al., Science 306 (2004), 2221-2224