期刊
PHYSICAL REVIEW LETTERS
卷 111, 期 16, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.166601
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资金
- Royal Society
- Korber Foundation
- U.S. Office of Naval Research
- U.S. Air Force Office of Scientific Research
- Engineering and Physical Sciences Research Council (UK)
- EU IRSES network InterNoM
- Stichting voor Fundamenteel Onderzoek der Materie (FOM, Netherlands)
- DFG [SPP 1459]
- BMBF
- Engineering and Physical Sciences Research Council [EP/G035954/1] Funding Source: researchfish
- EPSRC [EP/G035954/1] Funding Source: UKRI
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.
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