Weak localisation in bilayer graphene

Details Weak localisation in bilayer graphene Weak localisation in bilayer graphene

2007-01-27

arxiv.org/abs/cond-mat/0701686v2

Phys. Rev. Lett. Vol. 98, 176805 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures (to be published in PRL)

Scientific paper

10.1016/j.physe.2007.09.009

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.

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