Spin transport in magnetic graphene superlattices
National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, P.R. China
Corresponding author: a firstname.lastname@example.org
Revised: 12 October 2008
Published online: 14 November 2008
We study spin transport in normal/ferromagnetic/normal/ferromagnetic.../normal graphene superlattices, which can be realized by putting a series of magnetic insulator bars on top of a graphene sheet. Owing to magnetic proximity effect, local exchange splittings will be induced in the graphene sheet, effectively forming a magnetic graphene superlattice. The spin polarization of tunneling conductance and the magneto resistance (MR) exhibit oscillatory behavior with the gate voltage. The superlattice structure leads to an enhanced spin polarization and MR ratio, making the magnetic graphene superlattice become very promising in spintronics applications.
PACS: 72.25.-b – Spin polarized transport / 73.43.Jn – Tunneling / 81.05.Uw – Carbon, diamond, graphite
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008