Spin filter and spin valve in ferromagnetic graphene

Abstract

We propose and demonstrate that a EuO-induced and top-gated graphene ferromagnetic junction can be simultaneously operated as a spin filter as well as a spin valve. We attribute such a remarkable result to a coexistence of a half-metal band and a common energy gap for opposite spins in ferromagnetic graphene. We show that, both the spin filter and the spin valve can be effectively controlled by a back gate voltage, and they survive for practical metal contacts and finite temperature. Specifically, larger single spin currents and on-state currents can be reached with contacts with work functions similar to graphene, and the spin filter can operate at higher temperature than the spin valve.

arXiv comment5 pages, 5 figures

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Cited by in corpus (15)

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• Dissipationless Layertronics in Axion Insulator $\mathrm{MnB}{\mathrm{i}}_2\mathrm{T}{\mathrm{e}}_4$
• Nonlocal transistor based on pure crossed Andreev reflection in a EuO-graphene/superconductor hybrid structure
• Proximity magnetoresistance in graphene induced by magnetic insulators
• Spin-selectable, region-tunable negative differential resistance in graphene double ferromagnetic barriers
• Spin- and valley-dependent Goos-Hanchen effect in silicene and gapped graphene structures
• Growth and Characterisation Studies of Eu${}_3$O${}_4$ Thin Films Grown on Si/SiO${}_2$ and Graphene
• Magnetic dielectric- graphene- ferroelectric system as a promising non-volatile device for modern spintronics
• Edge states, spin transport and impurity induced local density of states in spin-orbit coupled graphene
• Strain engineering of ferromagnetic-graphene-ferroelectric nanostructures
• Determining the Proximity Effect Induced Magnetic Moment in Graphene by Polarized Neutron Reflectivity and X-ray Magnetic Circular Dichroism
• Gate control of lattice-pseudospin currents in graphene on WS2: Effect of sublattice symmetry breaking and spin-orbit interaction
• Electrically Tunable Spin Exchange Splitting in Graphene Hybrid Heterostructure
• Spin-Valley Beam Splitter in Graphene
• Nontrivial magnetic field related phenomena in the single-layer graphene on ferroelectric substrate