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

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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  • Author: Uppstu, Andreas

    Aalto University School of Science, Department of Applied Physics

  • Author: Saloriutta, Karri

    Aalto University School of Science, Department of Applied Physics

  • Author: Harju, Ari

    Aalto University School of Science, Helsinki Institute of Physics

  • Author: Puska, Martti

    Aalto University School of Science, Department of Applied Physics

  • Author: Jauho, Antti-Pekka

    Department of Micro- and Nanotechnology, Technical University of Denmark, Ørsteds Plads, 2800, Kgs. Lyngby, Denmark

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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 and Materials Physics)
Publication date2012
Volume85
Journal number4
Pages041401
ISSN1098-0121
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 7
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