Introduction

摘要

The discovery of a wonder material graphene-the first one-atom-thick crystal whose honeycomb lattice of carbon atoms imposes gapless, massless and chiral Dirac spectrum on its low-energy quasiparticles-has swiftly ignited intense theoretical and computational studies of its unusual electronic transport properties. The "first wave" of such studies [whose results are summarized in, e.g., Rev. Mod. Phys. 83, 407 (2011)] has been largely focused on explaining conductivity measurements at small bias voltage applied to large-area graphene samples as a function of carrier density, temperature and magnetic field, while typically relying on simplistic model Hamiltonians.