Measurement of scattering rate and minimum conductivity in graphene

Y. W. Tan; Y. Zhang; K. Bolotin; Y. Zhao; S. Adam; E. H. Hwang; S. Das Sarma; H. L. Stormer; P. Kim

doi:10.1103/PhysRevLett.99.246803

Measurement of scattering rate and minimum conductivity in graphene

Y. W. Tan
, Y. Zhang
, K. Bolotin
, Y. Zhao
, S. Adam
, E. H. Hwang
, S. Das Sarma
, H. L. Stormer
, P. Kim

Research output: Contribution to journal › Article › peer-review

942 Scopus citations

Abstract

The conductivity of graphene samples with various levels of disorder is investigated for a set of specimens with mobility in the range of 1-20×103cm2/Vsec. 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 2-15×1011cm-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.

Original language	English
Article number	246803
Journal	Physical Review Letters
Volume	99
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevLett.99.246803
State	Published - 14 Dec 2007
Externally published	Yes

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10.1103/PhysRevLett.99.246803

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title = "Measurement of scattering rate and minimum conductivity in graphene",

abstract = "The conductivity of graphene samples with various levels of disorder is investigated for a set of specimens with mobility in the range of 1-20×103cm2/Vsec. 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 2-15×1011cm-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.",

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AU - Tan, Y. W.

AU - Zhang, Y.

AU - Bolotin, K.

AU - Zhao, Y.

AU - Adam, S.

AU - Hwang, E. H.

AU - Das Sarma, S.

AU - Stormer, H. L.

AU - Kim, P.

PY - 2007/12/14

Y1 - 2007/12/14

N2 - The conductivity of graphene samples with various levels of disorder is investigated for a set of specimens with mobility in the range of 1-20×103cm2/Vsec. 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 2-15×1011cm-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.

AB - The conductivity of graphene samples with various levels of disorder is investigated for a set of specimens with mobility in the range of 1-20×103cm2/Vsec. 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 2-15×1011cm-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.

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DO - 10.1103/PhysRevLett.99.246803

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VL - 99

JO - Physical Review Letters

JF - Physical Review Letters

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ER -

Measurement of scattering rate and minimum conductivity in graphene

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