Universality in the low-voltage transport response of molecular wires physisorbed onto graphene electrodes
| Autor: | Víctor M. García-Suárez, R. Ferradás, Jaime Ferrer, Diego Carrascal |
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| Přispěvatelé: | Ministerio de Ciencia e Innovación (España), European Commission |
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | WOK RUO. Repositorio Institucional de la Universidad de Oviedo instname Digital.CSIC. Repositorio Institucional del CSIC |
| Popis: | PACS number(s): 72.80.Vp, 85.65.+h, 73.63.Rt, 71.15.Mb We 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. The research presented here was funded by the Spanish MICINN through Grants No. FIS2009-07081 and No. FIS2012-34858, and by the Marie Curie network NanoCTM.V.M.G.S. thanks the Spanish Ministerio de Ciencia e Innovación for a Ramón y Cajal fellowship (RYC-2010-06053). |
| Databáze: | OpenAIRE |
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