title: Giant nonlocality near the Dirac point in graphene.
abstract: Transport measurements have been a powerful tool for discovering electronic phenomena in graphene. We report nonlocal measurements performed in the Hall bar geometry with voltage probes far away from the classical path of charge flow. We observed a large nonlocal response near the Dirac point in fields as low as 0.1 tesla, which persisted up to room temperature. The nonlocality is consistent with the long-range flavor currents induced by the lifting of spin/valley degeneracy. The effect is expected to contribute strongly to all magnetotransport phenomena near the neutrality point.
authors.affiliation: Manchester Centre for Mesoscience and Nanotechnology, University of Manchester, Manchester M13 9PL, UK.
authors.forename: D A
authors.initials: DA
authors.lastname: Abanin
authors.forename: S V
authors.initials: SV
authors.lastname: Morozov
authors.forename: L A
authors.initials: LA
authors.lastname: Ponomarenko
authors.forename: R V
authors.initials: RV
authors.lastname: Gorbachev
authors.forename: A S
authors.initials: AS
authors.lastname: Mayorov
authors.forename: M I
authors.initials: MI
authors.lastname: Katsnelson
authors.forename: K
authors.initials: K
authors.lastname: Watanabe
authors.forename: T
authors.initials: T
authors.lastname: Taniguchi
authors.forename: K S
authors.initials: KS
authors.lastname: Novoselov
authors.forename: L S
authors.initials: LS
authors.lastname: Levitov
authors.forename: A K
authors.initials: AK
authors.lastname: Geim