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Formation of dispersive hybrid bands at an organic-metal interface

AuthorsGonzález-Lakunza, N.; Fernández-Torrente, I.; Franke, K. J.; Lorente, Nicolás ; Arnau, Andrés ; Pascual, José I.
KeywordsElectrical properties of polymers; organic compounds (thin films)
Surface structure of polymers and organic materials
Materials science
Issue Date17-Apr-2008
PublisherAmerican Physical Society
CitationPhysical Review Letters 100: 156805 (2008)
AbstractAn electronic band with quasi-one-dimensional dispersion is found at the interface between a monolayer of a charge-transfer complex (TTF-TCNQ) and a Au(111) surface. Combined local spectroscopy and numerical calculations show that the band results from a complex mixing of metal and molecular states. The molecular layer folds the underlying metal states and mixes with them selectively, through the TTF component, giving rise to anisotropic hybrid bands. Our results suggest that, by tuning the components of such molecular layers, the dimensionality and dispersion of organic-metal interface states can be engineered.
Description4 pp.-- PACS: 73.61.Ph, 68.35.bm, 68.37.Ef
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.100.156805
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