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O: Fachverband Oberflächenphysik

O 86: Oxides and Insulators: Adsorption

O 86.7: Vortrag

Freitag, 29. Februar 2008, 11:00–11:15, MA 141

Self-Organization of MgPc Molecules on FeO Thin Films — •Xiao Lin and Niklas Nilius — Fritz-Haber-Institut, Berlin, Germany

The spatial arrangement of Magnesium Phthalocyanine (MgPc) has been investigated on FeO films grown on Pt(111) with low-temperature STM and STS. The polar oxide film forms a coincidence lattice with the Pt support and exhibits a surface dipole between the Fe(+) / O(-) layers that varies within the Moiré unit cell. The MgPc molecules preferentially adsorb on regions with large dipole strength. The rotational orientation of the molecules, on the other hand, is determined by their interaction with the atomic Fe-O lattice. The influence of the different binding configurations on the electronic structure of MgPc is revealed from spectroscopic investigations.