Metallic and Insulating Adsorbates on Graphene

Details Metallic and Insulating Adsorbates on Graphene Metallic and Insulating Adsorbates on Graphene

2011-04-28

arxiv.org/abs/1104.5289v1

Appl. Phys. Lett. 98, 192101 (2011)

Physics

Condensed Matter

Materials Science

Scientific paper

10.1063/1.3588035

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.

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