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Title: | Symmetry lowering of pentacene molecular states interacting with a Cu surface | Authors: | Baldacchini, Chiara Mariani, Carlo Betti, Maria Grazia Vobornik, Ivana Fujii, Jun Annese, Emilia Rossi, Giorgio Ferretti, Andrea Calzolari, Arrigo Di Felice, Rosa Ruini, Alice Molinari, Elisa |
Journal: | Physical Review B - Condensed Matter and Materials Physics | Issue Date: | 2007 | Abstract: | Pentacene adsorbed on the Cu(119) vicinal surface forms long-range ordered chain structures. Photoemission spectroscopy measurements and ab initio density functional theory simulations provide consistent evidences that pentacene molecular orbitals mix with the copper bands, giving rise to interaction states localized at the interface. Angular-resolved and polarization dependent photoemission spectroscopy shows that most of the pentacene derived intensity is strongly dichroic. The symmetry of the molecular states of the free pentacene molecules is reduced upon adsorption on Cu(119), as a consequence of the molecule-metal interaction. Theoretical results show a redistribution of the charge density in π molecular states close to the Fermi level, consistent with the photoemission intensities (density of states) and polarization dependence (orbital symmetry). © 2007 The American Physical Society. |
URI: | http://hdl.handle.net/2067/42621 | ISSN: | 10980121 | DOI: | 10.1103/PhysRevB.76.245430 |
Appears in Collections: | A1. Articolo in rivista |
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