Dresden 2011 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 3: Metal substrates: Adsorption of organic / bio molecules I
O 3.6: Vortrag
Montag, 14. März 2011, 12:30–12:45, PHY C213
Electronic Mapping of Molecular Orbitals at the Molecule-Metal Interface — Maria Christina Lennartz, •Vasile Caciuc, Nicolae Atodiresei, Silvia Karthäuser, and Stefan Blügel — Peter Grünberg Institut & Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany
In the present contribution we report on a combined experimental and theoretical study aimed to investigate the electronic structure of an aromatic organic molecule like pyridine-2,5-dicarboxylic acid (C7H4NO4) chemisorbed on the Cu(110) surface. From experimental point of view, the electronic structure of the molecule-Cu(110) was determined by performing scanning tunneling spectroscopy (STS) measurements which enabled us to map the molecular orbitals as a function of tip position. By comparing the experimental differential conductance curves with the calculated density of states for different conformers of this organic molecule on Cu(110), the character (σ or π) of the individual molecular orbitals probed in STS could be clearly identified.
[1] M. C. Lennartz, V. Caciuc, N. Atodiresei, S. Karthäuser, and S. Blügel, Phys. Rev. Lett. 105, 066801 (2010).