The transport properties of a bilayer graphene are studied theoretically within a self-consistent Born approximation. The electronic spectrum is composed of k-linear dispersion in the low-energy region and k-square dispersion as in an ordinary two-dimensional metal at high energy, leading to a crossover between different behaviors in the conductivity on changing the Fermi energy or disorder strengths. We find that the conductivity approaches 2e2/π2ℏ per spin in the strong-disorder regime, independently of the short- or long-range disorder.
@article{arxiv.cond-mat/0606166,
title = {Transport in Bilayer Graphene: Calculations within a self-consistent Born approximation},
author = {Mikito Koshino and Tsuneya Ando},
journal= {arXiv preprint arXiv:cond-mat/0606166},
year = {2009}
}