Coulomb drag as a measure of trigonal warping in doped graphene

Details Coulomb drag as a measure of trigonal warping in doped graphene Coulomb drag as a measure of trigonal warping in doped graphene

2007-04-19

arxiv.org/abs/0704.2611v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 1 figure

Scientific paper

10.1103/PhysRevB.76.153409

I suggest to use the effect of Coulomb drag between two closely positioned graphite monolayers (graphene sheets) for experimental measurement of the strength of weak non-linearities of the spectrum in graphene. I consider trigonal warping as a representative mechanism responsible for the drag effect. Since graphene is relatively defect-free, I evaluate the drag conductivity in the ballistic regime and find that it is proportional to the fourth power of the warping strength.

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