12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Effect of a high-κ environment on charge carrie...
View graph of relations

« Back

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

Research output: Contribution to journalJournal article

Published

  • 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
???articleNumber???206603
Journal publication date21/05/2009
JournalPhysical Review Letters
Journal number20
Volume102
Number of pages4
Original languageEnglish

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.

Bibliographic note

© 2009 The American Physical Society