Impact of Calcium on Transport Property of Graphene
arXiv:1112.0675 · doi:10.1016/j.ssc.2011.11.003
Abstract
We have measured the impact of calcium adsorbates on the transport property of graphene. Although calcium renders conductivity linearly dependent on the carrier density of graphene as predicted, our experimental results diverge from the existing theoretical calculations. Our data expose the inadequacy of any existing theory to describe the minimum conductivity of graphene and indicate that a more complete testing of the impurity scattering calculations will require improving the experimental capabilities by minimizing the contribution from the substrate-bound charged impurities and developing an ability to count the number of adsorbates while measuring transport.
8 pages, 5 figures
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- Weak localization measurements of electronic scattering rates in Li-doped epitaxial graphene
- Fano-shaped impurity spectral density, electric-field-induced in-gap state and local magnetic moment of an adatom on trilayer graphene