Ultrathin epitaxial graphite: 2D electron gas properties and a route toward graphene-based nanoelectronics.

  title={Ultrathin epitaxial graphite: 2D electron gas properties and a route toward graphene-based nanoelectronics.},
  author={Claire Berger and Zhi-min Song and Tianbo Li and Xuebin Li and Asmerom Y. Ogbazghi and Rui Feng and Zhenting Dai and Alexei Marchenkov and Edward H. Conrad and Phillip N. First and Walter A. de Heer},
  journal={Journal of Physical Chemistry B},
We have produced ultrathin epitaxial graphite films which show remarkable 2D electron gas (2DEG) behavior. The films, composed of typically three graphene sheets, were grown by thermal decomposition on the (0001) surface of 6H−SiC, and characterized by surface science techniques. The low-temperature conductance spans a range of localization regimes according to the structural state (square resistance 1.5 kΩ to 225 kΩ at 4 K, with positive magnetoconductance). Low-resistance samples show… 

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