Giant magnetodrag in graphene at charge neutrality

M. Titov, R. V. Gorbachev, B. N. Narozhny, T. Tudorovskiy, M. Schütt, P. M. Ostrovsky, I. V. Gornyi, A. D. Mirlin, M. I. Katsnelson, K. S. Novoselov, A. K. Geim, L. A. Ponomarenko

    Research output: Contribution to journalArticlepeer-review

    Abstract

    We report experimental data and theoretical analysis of Coulomb drag between two closely positioned graphene monolayers in a weak magnetic field. Close enough to the neutrality point, the coexistence of electrons and holes in each layer leads to a dramatic increase of the drag resistivity. Away from charge neutrality, we observe nonzero Hall drag. The observed phenomena are explained by decoupling of electric and quasiparticle currents which are orthogonal at charge neutrality. The sign of magnetodrag depends on the energy relaxation rate and geometry of the sample.

    Original languageEnglish
    Article number166601
    JournalPhysical Review Letters
    Volume111
    Issue number16
    DOIs
    Publication statusPublished - 14 Oct 2013

    Research Beacons, Institutes and Platforms

    • National Graphene Institute

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