Giant Magnetodrag in Graphene at Charge Neutrality
| Autor: | Andre K. Geim, K. S. Novoselov, Roman V. Gorbachev, Boris Narozhny, P. M. Ostrovsky, Michael Schütt, Alexander D. Mirlin, Mikhail I. Katsnelson, Igor V. Gornyi, T. Tudorovskiy, Leonid Ponomarenko, Mikhail Titov |
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| Rok vydání: | 2013 |
| Předmět: |
Physics
Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Graphene Theory of Condensed Matter FOS: Physical sciences General Physics and Astronomy 02 engineering and technology Electron Decoupling (cosmology) Correlated Electron Systems / High Field Magnet Laboratory (HFML) 021001 nanoscience & nanotechnology 01 natural sciences law.invention Magnetic field law Drag Electrical resistivity and conductivity Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Quasiparticle Coulomb ComputingMethodologies_DOCUMENTANDTEXTPROCESSING 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review Letters, 111, 16 Physical Review Letters, 111 Physical Review Letters |
| ISSN: | 0031-9007 |
| Popis: | We report experimental data and theoretical analysis of Coulomb drag between two closely positioned graphene monolayers in weak magnetic field. Close enough to the neutrality point, coexistence of electrons and holes in each layer leads to a dramatic increase of the drag resistivity. Away from charge neutrality, we observe non-zero Hall drag. The observed phenomena are explained by decoupling of electric and quasiparticle currents which are orthogonal at charge neutrality. The sign of magneto-drag depends on the energy relaxation rate and geometry of the sample. 12 pages, 7 figures including supplemental information |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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