Strong suppression of weak 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. The unexpected observation is attributed to mesoscopic corrugations of graphene sheets which can cause a dephasing effect similar to that of a random magnetic field.
Morozov
S V
SV
Department of Physics, University of Manchester, Manchester M13 9PL, United Kingdom.
Novoselov
K S
KS
Katsnelson
M I
MI
Schedin
F
F
Ponomarenko
L A
LA
Jiang
D
D
Geim
A K
AK