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Electronic states of CuPc chains on the Au(110) surface

J. Chem. Phys. 131, 174710 (2009); doi:10.1063/1.3257606

Published 6 November 2009

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F. Evangelista,1 A. Ruocco,2 R. Gotter,3 A. Cossaro,3 L. Floreano,3 A. Morgante,3,4 F. Crispoldi,5 M. G. Betti,6 and C. Mariani6
1Dipartimento di Fisica, Università Roma Tre, I-00146 Roma, Italy
2Dipartimento di Fisica and CNISM, Università Roma Tre, I-00146 Roma, Italy
3Laboratorio Nazionale, TASC del CNR-INFM, I-34149 Trieste, Italy
4Dipartimento di Fisica, Università Trieste, I-34127 Trieste, Italy
5Dipartimento di Fisica, Università di Modena e Reggio Emilia, I-41100 Modena, Italy
6Dipartimento di Fisica, Università di Roma La Sapienza, I-00185 Roma, Italy
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 (5×3) 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. ©2009 American Institute of Physics
History: Received 23 May 2009; accepted 11 October 2009; published 6 November 2009
Permalink: http://link.aip.org/link/?JCPSA6/131/174710/1
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KEYWORDS and PACS

Keywords
PACS
  • 73.40.Qv
    Electrical properties of metal-insulator-semiconductor structures
  • 68.35.bd
    Surface structure of metals and alloys
  • 79.60.Jv
    Photoelectron spectra of interfaces; heterostructures; nanostructures
  • 73.20.At
    Surface states, band structure, electron density of states
  • YEAR: 2009

PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
Publisher:
AIP is a member of CrossRef AIP

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