Dresden 2011 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 27: Metal substrates: Adsorption of organic / bio molecules IV
O 27.4: Vortrag
Dienstag, 15. März 2011, 12:00–12:15, PHY C213
Electronic many–body effects at metal–organic interfaces studied with PES, NEXAFS and Resonant Auger Raman Spectroscopy — •M. Häming1, A. Schöll1, E. Umbach2, and F. Reinert1 — 1Universität Würzburg, Experimentelle Physik VII, D–97074 Würzburg, Germany — 2Karlsruhe Institut für Technologie (KIT) D–76021 Karlsruhe, Germany
Electronic many–body and correlation effects have been studied intensively at transition metal compounds with localized d/f electrons. They are related to interesting material properties, e.g. Mott metal–insulator transitions, charge transfer satellites and superconductivity. Recent investigations of graphene,1 C60,2 and TTF–TCNQ3 showed that many–body effects can also be important for organic thin films. We have investigated several organic thin films (PTCDA, PTCDI, BTCDA, BTCDI, SnPc) deposited on a Ag(111) surfaces with photoelectron spectroscopy, NEXAFS and resonant Auger Raman spectroscopy. Our data provide significant indications for electronic many–body effects involving substrate–adsorbate charge transfer, which can be understood by concepts developed for charge transfer compounds. These results give insight into new, interesting aspects of physics at metal–organic interfaces.
1 I. Gierz et al., Nano Letters 8, 4603–4607 (2008)
2 W. Yang et al., Science 300, 303–307 (2003)
3 M. Sing et al., Phys. Rev. B 68, 125111 (2003)