Holography of the Dirac Fluid in Graphene with Two Currents.
Recent experiments have uncovered evidence of the strongly coupled nature of graphene: the Wiedemann-Franz law is violated by up to a factor of 20 near the charge neutral point. We describe this strongly coupled plasma by a holographic model in which there are two distinct conserved U(1) currents. We find that our analytic results for the transport coefficients for the two current model have a significantly improved match to the density dependence of the experimental data than the models with only one current. The additive structure in the transport coefficients plays an important role. We also suggest the origin of the two currents.
Department of Physics, Hanyang University, Seoul 133-791, Korea.
Yunseok
Y
Seo
Department of Physics, Hanyang University, Seoul 133-791, Korea.
Geunho
G
Song
Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.|Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
Philip
P
Kim
Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.|Perimeter Institute for Theoretical Physics, Waterloo, Ontario N2L 2Y5, Canada.
Subir
S
Sachdev
Department of Physics, Hanyang University, Seoul 133-791, Korea.
Sang-Jin
SJ
Sin