Cheianov Vadim V, Fal'ko Vladimir I, Altshuler Boris L, Aleiner Igor L
Physics Department, Lancaster University, Lancaster, LA1 4YB, United Kingdom.
Phys Rev Lett. 2007 Oct 26;99(17):176801. doi: 10.1103/PhysRevLett.99.176801. Epub 2007 Oct 22.
Transport in undoped graphene is related to percolating current patterns in the networks of n- and p-type regions reflecting the strong bipolar charge density fluctuations. Finite transparency of the p-n junctions is vital in establishing the macroscopic conductivity. We propose a random resistor network model to analyze scaling dependencies of the conductance on the doping and disorder, the quantum magnetoresistance and the corresponding dephasing rate.
