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

A. Uppstu, K. Saloriutta, A. Harju, M. Puska, A.-P. Jauho

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Abstract

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
Article number041401
Pages (from-to)1-5
Number of pages5
JournalPhysical Review B
Volume85
Issue number4
DOIs
Publication statusPublished - 3 Jan 2012
MoE publication typeA1 Journal article-refereed

Keywords

  • electronic transport
  • graphene
  • structural defects

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    Uppstu, A., Saloriutta, K., Harju, A., Puska, M., & Jauho, A-P. (2012). Electronic transport in graphene-based structures: An effective cross section approach. Physical Review B, 85(4), 1-5. [041401]. https://doi.org/10.1103/PhysRevB.85.041401