title: Electronic structure at transition metal phthalocyanine-transition metal oxide interfaces: Cobalt phthalocyanine on epitaxial MnO films.
abstract: The electronic structure of the interface between cobalt phthalocyanine (CoPc) and epitaxially grown manganese oxide (MnO) thin films is studied by means of photoemission (PES) and X-ray absorption spectroscopy (XAS). Our results reveal a flat-lying adsorption geometry of the molecules on the oxide surface which allows a maximal interaction between the π-system and the substrate. A charge transfer from MnO, in particular, to the central metal atom of CoPc is observed by both PES and XAS. The change of the shape of N-K XAS spectra at the interface points, however, to the involvement of the Pc macrocycle in the charge transfer process. As a consequence of the charge transfer, energetic shifts of MnO related core levels were observed, which are discussed in terms of a Fermi level shift in the semiconducting MnO films due to interface charge redistribution.
authors.affiliation: Institut für Physikalische und Theoretische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
authors.forename: Mathias
authors.initials: M
authors.lastname: Glaser
authors.affiliation: Institut für Physikalische und Theoretische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
authors.forename: Heiko
authors.initials: H
authors.lastname: Peisert
authors.affiliation: Institut für Physikalische und Theoretische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
authors.forename: Hilmar
authors.initials: H
authors.lastname: Adler
authors.affiliation: Institut für Physikalische und Theoretische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
authors.forename: Umut
authors.initials: U
authors.lastname: Aygül
authors.affiliation: Institut für Physikalische und Theoretische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
authors.forename: Milutin
authors.initials: M
authors.lastname: Ivanovic
authors.affiliation: Karlsruher Institut für Technologie, Institut für Festkörperphysik, 76021 Karlsruhe, Germany.
authors.forename: Peter
authors.initials: P
authors.lastname: Nagel
authors.affiliation: Karlsruher Institut für Technologie, Institut für Festkörperphysik, 76021 Karlsruhe, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Merz
authors.affiliation: Karlsruher Institut für Technologie, Institut für Festkörperphysik, 76021 Karlsruhe, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Schuppler
authors.affiliation: Institut für Physikalische und Theoretische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Chassé