Regensburg 2010 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
O: Fachverband Oberflächenphysik
O 54: Electronic structure II
O 54.8: Talk
Wednesday, March 24, 2010, 16:45–17:00, H33
Electronic structure of carboxylate molecules on Cu(110) surface: An experimental and theoretical investigation — •Vasile Caciuc, Christina Lennartz, Nicolae Atodiresei, Silvia Karthäuser, Rainer Waser, and Stefan Blügel — Institut für Festkörperforschung, Forschungszentrum Jülich, D-52425 Jülich, Germany
In the present contribution we report on a combined experimental and theoretical study focused on the electronic structure of aromatic organic molecules like benzoic acid (C7H6O2) and pyridine-2-carboxylic acid (C6H5NO2) adsorbed on the Cu(110) surface. A special focus of our study is to investigate the role of the substitution of an CH functional group by an N atom or by the addition of a second carboxylic group on the electronic properties of the adsorbate-substrate system. In particular, the electronic structure of the molecule-Cu(110) surface was analyzed by recording the differential conductance dI/dV curves, whose shape show a significant dependence on the tip-molecule distance. A clear picture of the nature of the molecule-substrate states that lead to the observed shape of the dI/dV curves was achieved by comparing the experimental differential conductance with the calculated density of states for the carboxylate-surface systems under consideration.