Metallic and Insulating Adsorbates on Graphene

Abstract

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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Cited by in corpus (8)

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• Hydrogen storage with titanium-functionalized graphene
• Absence of a transport signature of spin-orbit coupling in graphene with indium adatoms
• On adatomic-configuration-mediated correlation between electrotransport and electrochemical properties of graphene
• Molecular beam epitaxy growth of SrO buffer layers on graphite and graphene for the integration of complex oxides
• Efficient n-type Doping in Epitaxial Graphene through Strong Lateral Orbital Hybridization of Ti Adsorbate
• Observation of quantum Hall plateau-plateau transition and scaling behavior of the zeroth Landau level in graphene p-n-p junctions
• Local charge transfer doping in suspended graphene nanojunctions