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Universality in the low-voltage transport response of molecular wires physisorbed onto graphene electrodes

AuthorsGarcía-Suárez, Víctor M. ; Ferradás, R. ; Carrascal, Diego ; Ferrer, Jaime
Issue Date2013
PublisherAmerican Physical Society
CitationPhysical Review B 87(23): 235425 (2013)
AbstractWe analyze the low-voltage transport response of large molecular wires bridging graphene electrodes, where the molecules are physisorbed onto the graphene sheets by planar anchor groups. In our study, the sheets are pulled away to vary the gap length and the relative atomic positions. The molecular wires are also translated in directions parallel and perpendicular to the sheets. We show that the energy position of the Breit-Wigner molecular resonances is universal for a given molecule, in the sense that it is independent of the details of the graphene edges, gaps lengths, or of the molecule positions. We discuss the need to converge carefully the k sampling to provide reasonable values of the conductance.
DescriptionPACS number(s): 72.80.Vp, 85.65.+h, 73.63.Rt, 71.15.Mb
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevB.87.235425
Appears in Collections:(CINN) Artículos
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