Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-02-17
Nano Lett., Article ASAP, Publication Date (Web): February 17, 2011. http://pubs.acs.org/doi/abs/10.1021/nl104399z
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Article: 14 pages, 4 figures. Supporting information: 8 pages, 3 figures
Scientific paper
Graphene has been proposed as a promising material for future nanoelectronics because of its unique electronic properties. Understanding the scaling behavior of this new nanomaterial under common experimental conditions is of critical importance for developing graphene-based nanoscale devices. We present a comprehensive experimental and theoretical study on the influence of edge disorder and bulk disorder on the minimum conductivity of graphene ribbons. For the first time, we discovered a strong non-monotonic size scaling behavior featuring a peak and saturation minimum conductivity. Through extensive numerical simulations and analysis, we are able to attribute these features to the amount of edge and bulk disorder in graphene devices. This study elucidates the quantum transport mechanisms in realistic experimental graphene systems, which can be used as a guideline for designing graphene-based nanoscale devices with improved performance.
Appenzeller Joerg
Low Tony
Lundstrom Mark
Sui Yang
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