Effect of a high-κ environment on charge carrier mobility in graphene

L. A. Ponomarenko; R. Yang; T. M. Mohiuddin; M. I. Katsnelson; K. S. Novoselov; S. V. Morozov; A. A. Zhukov; F. Schedin; E. W. Hill; A. K. Geim

doi:10.1103/PhysRevLett.102.206603

Effect of a high-κ environment on charge carrier mobility in graphene

L. A. Ponomarenko, R. Yang, T. M. Mohiuddin, M. I. Katsnelson, K. S. Novoselov, S. V. Morozov, A. A. Zhukov, F. Schedin, E. W. Hill, A. K. Geim

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

321 Citations (SciVal)

Abstract

It is widely assumed that the dominant source of scattering in graphene is charged impurities in a substrate. We have tested this conjecture by studying graphene placed on various substrates and in high-κ media. Unexpectedly, we have found no significant changes in carrier mobility either for different substrates or by using glycerol, ethanol, and water as a top dielectric layer. This suggests that Coulomb impurities are not the scattering mechanism that limits the mean free path attainable for graphene on a substrate.

Original language	English
Article number	206603
Journal	Physical Review Letters
Volume	102
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.102.206603
Publication status	Published - May 18 2009
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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AU - Mohiuddin, T. M.

AU - Katsnelson, M. I.

AU - Novoselov, K. S.

AU - Morozov, S. V.

AU - Zhukov, A. A.

AU - Schedin, F.

AU - Hill, E. W.

AU - Geim, A. K.

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Effect of a high-κ environment on charge carrier mobility in graphene

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