Dresden 2017 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
O: Fachverband Oberflächenphysik
O 46: Electronic Structure of Surfaces: Spectroscopy, Surface States
O 46.1: Poster
Tuesday, March 21, 2017, 18:30–20:30, P1A
Influence of the Surface Structure on Photoelectron Momentum Maps Measured for Coronene Monolayers on Ag(111) — •Christian Udhardt1, Felix Otto1, Tino Kirchhübel1, Falko Sojka1, Tobias Hümpfner1, Matthias Meißner1, Christian Kern2, Daniel Lüftner2, Peter Puschnig2, Bernd Schröter1, Roman Forker1, and Torsten Fritz1 — 1Institute of Solid State Physics, Friedrich Schiller University Jena, Helmholtzweg 5, 07743 Jena, Germany — 2Institute of Physics, University of Graz, 8010 Graz, Austria
Photoelectron momentum maps (PMMs) can be helpful to investigate molecular states near the Fermi edge, even though their discussion may be complicated by substrate- and film-induced effects. Here, we present PMMs of 1 ML coronene thin films on Ag(111) and compare them to simulations of a free coronene molecule, the 4× 4 film structure observed with low-energy electron diffraction (LEED), and angle-resolved ultraviolet photoemission spectroscopy (ARUPS). While the substructure observed in the PMM of the highest occupied molecular orbital (HOMO) is shown to coincide with the structure of the coronene film, the features in the PMM taken at the Fermi edge are conform with a film-induced back-folding of substrate bands without the influence of a molecular state.