Spin filter and spin valve in ferromagnetic graphene
arXiv:1506.02127 · doi:10.1063/1.4921668
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.
5 pages, 5 figures
References in corpus (16)
- Electric Field Effect in Atomically Thin Carbon Films
- Giant Intrinsic Carrier Mobilities in Graphene and Its Bilayer
- Suspended Graphene: a bridge to the Dirac point
- Intrinsic and Extrinsic Performance Limits of Graphene Devices on SiO2
- Doping graphene with metal contacts
- Valley filter and valley valve in graphene
- Andreev reflection and Klein tunneling in graphene
- Spin qubits in graphene quantum dots
- Spin-orbit coupling in curved graphene, fullerenes, nanotubes, and nanotube caps
- Quantum-limited shot noise in graphene
- Spin transport in proximity induced ferromagnetic graphene
- Magnetic Insulator-Induced Proximity Effects in Graphene: Spin Filtering and Exchange Splitting Gaps
- Integration of the Ferromagnetic Insulator EuO onto Graphene
- Wavevector-dependent spin filtering and spin transport through magnetic barriers in graphene
- Finite temperature inelastic mean free path and quasiparticle lifetime in graphene
- Quantum behavior of graphene transistors near the scaling limit
Cited by in corpus (6)
- 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
- Magnetic dielectric- graphene- ferroelectric system as a promising non-volatile device for modern spintronics
- Strain engineering of ferromagnetic-graphene-ferroelectric nanostructures
- Spin-Valley Beam Splitter in Graphene
- Nontrivial magnetic field related phenomena in the single-layer graphene on ferroelectric substrate