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

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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 languageEnglish
Article number206603
JournalPhysical Review Letters
Volume102
Issue number20
DOIs
Publication statusPublished - May 18 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Ponomarenko, L. A., Yang, R., Mohiuddin, T. M., Katsnelson, M. I., Novoselov, K. S., Morozov, S. V., Zhukov, A. A., Schedin, F., Hill, E. W., & Geim, A. K. (2009). Effect of a high-κ environment on charge carrier mobility in graphene. Physical Review Letters, 102(20), [206603]. https://doi.org/10.1103/PhysRevLett.102.206603