Regensburg 2019 – scientific programme

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O: Fachverband Oberflächenphysik

O 60: Organic Molecules on Inorganic Substrates IV: Electronic Properties, Excitations, Dynamics

O 60.1: Talk

Wednesday, April 3, 2019, 15:00–15:15, H24

Quantum size oscillations of oligoacene gaps adsorbed on Au(111) — •Richard Korytár — Charles University, Prague, Czech Republic

For gas phase oligoacenes, our recent theoretical work suggests a possibility for oscillations of the excitation gaps with the length of the molecule. In view of the recent experimental progress of on-surface synthesis, we employ the density functional theory to investigate here the fate of these oscillations for oligoacenes adsorbed on a Au(111) surface. Since the long range-nature of the Coulomb interaction is removed on metallic substrates due to screening, correlation effects are weaker and the tendency towards oscillatory behavior is enhanced.