2008/02/29 by C. Jozsa, C. Józsa, M. Popinciuc +4 · 166 citations
Engineering · Materials Science · Physics and Astronomy · #Condensed matter physics #Electric field #Electron #Ferromagnetism #Field (mathematics) #Graphene #Graphene research and applications #Molecular Junctions and Nanostructures #Physics #Quantum and electron transport phenomena #Quantum mechanics #Spin (aerodynamics) #Spin diffusion #Spins #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.100.236603
published in Physical Review Letters 100(23), 236603 (American Physical Society) · 4 figures
arxiv created 2008/04/14 · openalex publication_date 2008/06/13 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We studied the drift of electron spins under an applied dc electric field in single layer graphene spin valves in a field-effect transport geometry at room temperature. In the metallic conduction regime (n\ensuremath≃3.5\ifmmode×\else\texttimes\fi1016 m^\ensuremath-2), for dc fields of about \ifmmode±\else\textpm\fi70 kV/m applied between the spin injector and spin detector, the spin valve signals are increased or decreased, depending on the direction of the dc field and the carrier type, by as much as \ifmmode±\else\textpm\fi50%. Sign reversal of the drift effect is observed when switching from hole to electron conduction. In the vicinity of the Dirac neutrality point the drift effect is strongly suppressed. The experiments are in quantitative agreement with a drift-diffusion model of spin transport.