Electronic transport in graphene-based structures: An effective cross-section approach

Andreas Uppstu, Karri Saloriutta, Ari Harju, Martti Puska, Antti-Pekka Jauho

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    We show that transport in low-dimensional carbon structures with finite concentrations of scatterers can be modeled by utilizing scaling theory and effective cross sections. Our results are based on large-scale numerical simulations of carbon nanotubes and graphene nanoribbons, using a tight-binding model with parameters obtained from first-principles electronic structure calculations. As shown by a comprehensive statistical analysis, the scattering cross sections can be used to estimate the conductance of a quasi-one-dimensional system both in the Ohmic and localized regimes. They can be computed with good accuracy from the transmission functions of single defects, greatly reducing the computational cost and paving the way toward using first-principles methods to evaluate the conductance of mesoscopic systems, consisting of millions of atoms.
    Original languageEnglish
    JournalPhysical Review B Condensed Matter
    Issue number4
    Pages (from-to)041401
    Publication statusPublished - 2012


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