Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2009-01-11
nternational Journal of Modern Physics B (IJMPB) Volume: 22 No: 25/26 Year: 2008 pp. 4579-4588
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
9 pages, 5 figures
Scientific paper
Graphene is a fascinating material for exploring fundamental science questions as well as a potential building block for novel electronic applications. In order to realize the full potential of this material the fabrication techniques of graphene devices, still in their infancy, need to be refined to better isolate the graphene layer from the environment. We present results from a study on the influence of extrinsic factors on the quality of graphene devices including material defects, lithography, doping by metallic leads and the substrate. The main finding is that trapped Coulomb scatterers associated with the substrate are the primary factor reducing the quality of graphene devices. A fabrication scheme is proposed to produce high quality graphene devices dependably and reproducibly. In these devices, the transport properties approach theoretical predictions of ballistic transport.
Andrei Eva Y.
Du Xu
Skachko Ivan
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