Low-field magnetoresistance is ubiquitous in low-dimensional metallic systems with high resistivity and well understood as arising due to quantum interference on self-intersecting diffusive trajectories. We have found that in graphene this weak-localization magnetoresistance is strongly suppressed and, in some cases, completely absent. This unexpected observation is attributed to mesoscopic corrugations of graphene sheets which cause a dephasing effect similar to that of a random magnetic field.
@article{arxiv.cond-mat/0603826,
title = {Strong suppression of weak (anti)localization in graphene},
author = {S. V. Morozov and K. S. Novoselov and M. I. Katsnelson and F. Schedin and L. A. Ponomarenko and D. Jiang and A. K. Geim},
journal= {arXiv preprint arXiv:cond-mat/0603826},
year = {2007}
}
Comments
improved presentation of the theory part after referees comments; important experimental info added (see "note added in proof")