2013/03/31 by M. Titov, Roman Gorbachev, R. V. Gorbachev +14 · 83 citations
Materials Science · Physics and Astronomy · #Condensed matter physics #Coulomb #Decoupling (probability) #Drag #Electric field #Electron #Graphene #Graphene research and applications #Mechanics #Physics #Quantum and electron transport phenomena #Quantum mechanics #Quasiparticle #Superconductivity #Surface and Thin Film Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.111.166601
published in Physical Review Letters 111(16), 166601 (American Physical Society) · 12 pages, 7 figures including supplemental information
openalex publication_date 2013/10/14 · arxiv created 2013/12/09 · arxiv updated 2013/12/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.