Edge magnetotransport fingerprints in disordered graphene nanoribbons

4 páginas, 4 figuras.-- PACS number(s): 72.80.Vp, 73.22.Pr, 75.47.-m.-- et al.We report on (magneto)transport experiments in chemically derived narrow graphene nanoribbons under high magnetic fields (up to 60 T). Evidences of field-dependent electronic confinement are given and allow estimating the possible ribbon edge symmetry. A large positive magnetoconductance indicates a strong suppression of backscattering induced by the magnetic field. Such scenario is supported by tight-binding calculations which consider different types of underlying disorders (smooth edge disorder and long-range Coulomb scatterers).Part of this work was supported by EuroMagNET, Contract No. 228043. S.R. acknowledges the ANR/P3N2009 (Project No. ANR-09-NANO-016-01).Peer reviewe