Abstract

The conductivity of graphene samples with various levels of disorder is investigated for a set of specimens with mobility in the range of 1-20x10(3) cm2/V sec. Comparing the experimental data with the theoretical transport calculations based on charged impurity scattering, we estimate that the impurity concentration in the samples varies from 2-15x10(11) cm(-2). In the low carrier density limit, the conductivity exhibits values in the range of 2-12e2/h, which can be related to the residual density induced by the inhomogeneous charge distribution in the samples. The shape of the conductivity curves indicates that high mobility samples contain some short-range disorder whereas low mobility samples are dominated by long-range scatterers.

Keywords

GrapheneConductivityMaterials scienceImpurityScatteringRange (aeronautics)Electrical resistivity and conductivityCondensed matter physicsScattering rateResidual resistivityPhysicsOpticsNanotechnologyComposite material

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Year
2007
Type
article
Volume
99
Issue
24
Pages
246803-246803
Citations
1016
Access
Closed

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Cite This

Yan‐Wen Tan, Y. Zhang, Kirill I. Bolotin et al. (2007). Measurement of Scattering Rate and Minimum Conductivity in Graphene. Physical Review Letters , 99 (24) , 246803-246803. https://doi.org/10.1103/physrevlett.99.246803

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DOI
10.1103/physrevlett.99.246803