title: Electronic states of CuPc chains on the Au(110) surface.
abstract: The electronic properties of Cu-phthalocyanine (CuPc) molecules flat lying along the channels of the Au(110) reconstructed surface have been investigated by means of ultraviolet and x-ray photoelectron spectroscopy. The ordered chains give rise to a highly ordered single-layer structure with a (5x3) symmetry. Although from the core-level analysis not any significant charge transfer between the molecules and the underlying Au surface is observed, the valence band photoemission data bring to light CuPc-induced features localized at the interface. In particular, energy versus momentum dispersion of an interface state reveals a bandwidth of about 90 meV along the enlarged Au channels, where the CuPc chains are formed, with a defined fivefold symmetry well fitting the CuPc intermolecular distance.
authors.affiliation: Dipartimento di Fisica, Università Roma Tre, I-00146 Roma, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Evangelista
authors.forename: A
authors.initials: A
authors.lastname: Ruocco
authors.forename: R
authors.initials: R
authors.lastname: Gotter
authors.forename: A
authors.initials: A
authors.lastname: Cossaro
authors.forename: L
authors.initials: L
authors.lastname: Floreano
authors.forename: A
authors.initials: A
authors.lastname: Morgante
authors.forename: F
authors.initials: F
authors.lastname: Crispoldi
authors.forename: M G
authors.initials: MG
authors.lastname: Betti
authors.forename: C
authors.initials: C
authors.lastname: Mariani