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

Ponomarenko, L. A. and Yang, R. and Mohiuddin, T. M. and Katsnelson, M. I. and Novoselov, K. S. and Morozov, S. V. and Zhukov, A. A. and Schedin, F. and Hill, E. W. and Geim, A. K. (2009) Effect of a high-κ environment on charge carrier mobility in graphene. Physical review letters, 102 (20). ISSN 0031-9007

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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.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Additional Information:
© 2009 The American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
66743
Deposited By:
Deposited On:
26 Sep 2013 10:14
Refereed?:
Yes
Published?:
Published
Last Modified:
31 Oct 2020 02:50