Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 47: Electronic Structure of Surfaces: Spectroscopy, Surface States
O 47.6: Poster
Dienstag, 8. März 2016, 18:15–20:30, Poster E
Investigation of Coronene Thin-Films on Ag(111) Using Photoelectron Spectroscopy — •Christian Udhardt, Felix Otto, Tino Kirchhübel, Falko Sojka, Tobias Hümpfner, Bernd Schröter, Roman Forker, and Torsten Fritz — Institute of Solid State Physics, Friedrich Schiller University Jena, Helmholtzweg 5, 07743 Jena, Germany
Several metal-intercalated aromatic hydrocarbons, including potassium intercalated coronene, were found to have superconductive properties [Kubozono et. al, Phys. Chem. Chem. Phys. 13, 16476 (2011)]. Preparing and investigating the organic materials as thin films on various substrates can give access to the underlying mechanisms of the observed superconductivity and make the materials available for a potential use in electronic devices. Here we characterized the electronic structure of the coronene molecules prepared as thin films in the monolayer range on Ag(111) using ultraviolet and X-ray photoelectron spectroscopy (UPS and XPS). Comparing the results of kx, ky -dependent UPS measurements with those from low-energy electron diffraction (LEED) and density functional theory (DFT) calculations we were able to reconstruct the alignment of the coronene molecules with respect to the Ag(111) surface. Results after doping the films with potassium are presented as well.