Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2007-10-28
Phys. Rev. Lett. 100, 016602 (2008)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
Scientific paper
10.1103/PhysRevLett.100.016602
We have studied temperature dependences of electron transport in graphene and its bilayer and found extremely low electron-phonon scattering rates that set the fundamental limit on possible charge carrier mobilities at room temperature. Our measurements have shown that mobilities significantly higher than 200,000 cm2/Vs are achievable, if extrinsic disorder is eliminated. A sharp (threshold-like) increase in resistivity observed above approximately 200K is unexpected but can qualitatively be understood within a model of a rippled graphene sheet in which scattering occurs on intra-ripple flexural phonons.
Elias D. C.
Geim Andre K.
Jaszczak J. A.
Katsnelson Mikhail I.
Morozov Sergey V.
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