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Title: Electronic states of CuPc chains on the Au(110) surface
Authors: Evangelista, Ferdinand
Ruocco, Alessandro
Gotter, Roberto
Cossaro, A.
Floreano, L.
Morgante, A.
Crispoldi, F.
Betti, M. G.
Mariani, C.
Keywords: Ultra-thin films
Interface state dispersion
Organic molecules
Surface reconstruction
Issue Date: Nov-2009
Publisher: AIP
Abstract: The electronic properties of Cu-phthalocyanine (CuPc) molecules flatlying along the channels of the Au(110) reconstructed surface have beeninvestigated by means of ultraviolet and x-ray photoelectronspectroscopy. The ordered chains give rise to a highly orderedsingle-layer structure with a (5x3) symmetry. Although from thecore-level analysis not any significant charge transfer between themolecules and the underlying Au surface is observed, the valence bandphotoemission data bring to light CuPc-induced features localized atthe interface. In particular, energy versus momentum dispersion of aninterface state reveals a bandwidth of about 90 meV along the enlargedAu channels, where the CuPc chains are formed, with a defined fivefoldsymmetry well fitting the CuPc intermolecular distance.
ISSN: 0021-9606
DOI: 10.1063/1.3257606
Appears in Collections:A - Articolo su rivista
X_Dipartimento di Fisica 'Edoardo Amaldi'

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