Physical Review Letters
Metal to Insulator Transition on the N = 0 Landau Level in Graphene
Physical Review Letters · 105, 046804 (2010)
Read original paper
Introduction
Temperature-dependent transport distinguishes metallic and insulating behaviour on graphene's lowest Landau level. The crossover occurs near an absolute filling factor of 0.65 in the reported sample and correlates with a zero plateau in Hall conductivity.
A closer reading
A large resistance at high field is not, on its own, an insulation criterion. The authors compare the sign of the temperature dependence with the Hall response, clarifying how carrier density and field enter their low-temperature phase diagram.