Rights statement: © 2009 The American Physical Society
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Effect of a high-κ environment on charge carrier mobility in graphene
AU - Ponomarenko, L. A.
AU - Yang, R.
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.
N1 - © 2009 The American Physical Society
PY - 2009/5/21
Y1 - 2009/5/21
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=66049085166&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.102.206603
DO - 10.1103/PhysRevLett.102.206603
M3 - Journal article
VL - 102
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 20
M1 - 206603
ER -