Dresden 2009 – scientific programme

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O: Fachverband Oberflächenphysik

O 4: Metal substrates: Adsorption of organic / bio molecules I

O 4.5: Talk

Monday, March 23, 2009, 12:15–12:30, SCH A118

Electronic structure of FeTPC on Cu(111) vs Cu(100) investigated with STM and STS — •Stefan Kuck, Leonid Lichtenstein, Germar Hoffmann, and Roland Wiesendanger — Institute of Applied Physics, University of Hamburg, Hamburg, Germany

The investigation of organic molecular systems on metallic surfaces is of great interest due to the manifold applications derived from this combination. However, complications arise from the hybridization of molecule and substrate states at the molecule-substrate interface. Here we locally address the interface of corrole molecules and copper surfaces. In a recent STM study we could show the influence of the substrate on the geometry of iron triphenylcorrole (FeTPC) molecules inducing a bending into a saddle conformation [1]. Molecules are completely asymmetric on the copper substrate which results in a very peculiar electronic structure. We present the influence of the different facets of the copper substrate on the appearance of molecular orbitals spatially resolved in maps of differential conductance.

[1] S. Kuck et al., J. Am. Chem. Soc. 2008, 130, 14072