The Effect of Cluster Formation on Graphene Mobility

Abstract

We investigate the effect of gold (Au) atoms in the form of both point-like charged impurities and clusters on the transport properties of graphene. Cryogenic deposition (18 K) of Au decreases the mobility and shifts the Dirac point in a manner that is consistent with scattering from point-like charged impurities. Increasing the temperature to room temperature promotes the formation of clusters, which is verified with atomic force microscopy. We find that for a fixed amount of Au impurities, the formation of clusters enhances the mobility and causes the Dirac point to shift back towards zero.

12 pages, 3 figures

References in corpus (17)

• The electronic properties of graphene
• Two-Dimensional Gas of Massless Dirac Fermions in Graphene
• The Raman Fingerprint of Graphene
• Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
• Detection of Individual Gas Molecules Absorbed on Graphene
• Giant Intrinsic Carrier Mobilities in Graphene and Its Bilayer
• Doping graphene with metal contacts
• Charged Impurity Scattering in Graphene
• Atomic Structure of Graphene on SiO2
• First-principles study of the interaction and charge transfer between graphene and metals
• A self-consistent theory for graphene transport
• Measurement of Scattering Rate and Minimum Conductivity in Graphene
• Photocurrent imaging and efficient photon detection in a graphene transistor
• Atomic Hole Doping of Graphene
• Electronic Doping and Scattering by Transition Metals on Graphene
• Elastic scattering theory and transport in graphene
• Gold in graphene: in-plane adsorption and diffusion

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