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

Research output: Contribution to journalJournal article


  • 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
Article number206603
<mark>Journal publication date</mark>21/05/2009
<mark>Journal</mark>Physical Review Letters
Issue number20
Number of pages4
<mark>Original language</mark>English


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.

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© 2009 The American Physical Society