Coulomb Drag of Massless Fermions in Graphene

Details Coulomb Drag of Massless Fermions in Graphene Coulomb Drag of Massless Fermions in Graphene

2010-10-11

arxiv.org/abs/1010.2113v2

Phys. Rev. B 83, 161401 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 5 figures

Scientific paper

Using a novel structure, consisting of two, independently contacted graphene single layers separated by an ultra-thin dielectric, we experimentally measure the Coulomb drag of massless fermions in graphene. At temperatures higher than 50 K, the Coulomb drag follows a temperature and carrier density dependence consistent with the Fermi liquid regime. As the temperature is reduced, the Coulomb drag exhibits giant fluctuations with an increasing amplitude, thanks to the interplay between coherent transport in the graphene layer and interaction between the two layers.

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