Strong suppression of weak (anti)localization in graphene
  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. 
S.V. Morozov, K.S. Novoselov, M.I. Katsnelson, F. Schedin, L.A.   Ponomarenko, D. Jiang, & A.K. Geim