Quantum transport of massless Dirac fermions in graphene
  Motivated by recent graphene transport experiments, we have undertaken a numerical study of the conductivity of disordered two-dimensional massless Dirac fermions.   Our results reveal distinct differences between the cases of short-range and Coulomb randomly distributed scatterers.   We speculate that this behavior is related to the   Boltzmann transport theory prediction of dirty-limit behavior for Coulomb scatterers. 
Kentaro Nomura, A.H. MacDonald