arXiv:0906.3809 [cond-mat.mes-hall]AbstractReferencesReviewsResources
Wavevector-dependent spin filtering and spin transport through magnetic barriers in graphene
Published 2009-06-20Version 1
We study the spin-resolved transport through magnetic nanostructures in monolayer and bilayer graphene. We take into account both the orbital effect of the inhomogeneous perpendicular magnetic field as well as the in-plane spin splitting due to the Zeeman interaction and to the exchange coupling possibly induced by the proximity of a ferromagnetic insulator. We find that a single barrier exhibits a wavevector-dependent spin filtering effect at energies close to the transmission threshold. This effect is significantly enhanced in a resonant double barrier configuration, where the spin polarization of the outgoing current can be increased up to 100% by increasing the distance between the barriers.
Comments: 10 pages, 12 figures
Journal: Phys. Rev. B 80, 155416 (2009)
Categories: cond-mat.mes-hall
Keywords: spin transport, magnetic barriers, wavevector-dependent spin filtering effect, inhomogeneous perpendicular magnetic field, resonant double barrier configuration
Tags: journal article
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