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Paper detail

Metallic and Insulating Adsorbates on Graphene

We directly compare the effect of metallic titanium (Ti) and insulating titanium dioxide (TiO2) on the transport properties of single layer graphene. The deposition of Ti results in substantial n-type doping and a reduction of graphene mobility by charged impurity scattering. Subsequent exposure to oxygen largely reduces the doping and scattering by converting Ti into TiO2. In addition, we observe evidence for short-range scattering by TiO2 impurities. These results illustrate the contrasting scattering mechanisms for identical spatial distributions of metallic and insulating adsorbates.

preprint2011arXivOpen access
K. M. McCrearyK. PiR. K. Kawakami
cond-mat.othercond-mat.mtrl-sci
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K. M. McCrearyK. PiR. K. Kawakami

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