Giant magnetodrag in graphene at charge neutrality

Titov, M. and Gorbachev, R. V. and Narozhny, B. N. and Tudorovskiy, T. and Schuett, M. and Ostrovsky, P. M. and Gornyi, I. V. and Mirlin, A. D. and Katsnelson, M. I. and Novoselov, K. S. and Geim, A. K. and Ponomarenko, L. A. (2013) Giant magnetodrag in graphene at charge neutrality. Physical review letters, 111 (16): 166601. ISSN 1079-7114

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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.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Additional Information:
© 2013 American Physical Society
Uncontrolled Keywords:
?? coulomb dragelectron-systemsphysics and astronomy(all) ??
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Deposited On:
08 Sep 2014 10:07
Last Modified:
31 Dec 2023 00:31