We have performed the first experimental investigation of quantum interference corrections to the conductivity of a bilayer graphene structure. A negative magnetoresistance - a signature of weak localisation - is observed at different carrier densities, including the electro-neutrality region. It is very different, however, from the weak localisation in conventional two-dimensional systems. We show that it is controlled not only by the dephasing time, but also by different elastic processes that break the effective time-reversal symmetry and provide invervalley scattering.
@article{arxiv.cond-mat/0701686,
title = {Weak localisation in bilayer graphene},
author = {R. V. Gorbachev and F. V. Tikhonenko and A. S. Mayorov and D. W. Horsell and A. K. Savchenko},
journal= {arXiv preprint arXiv:cond-mat/0701686},
year = {2009}
}