Spin-Polarized Electrons in Bilayer Graphene Flakes

Abstract

We show that a bilayer graphene flake deposited above a ferromagnetic insulator can behave as a spin-filtering device. The ferromagnetic material induces exchange splitting in the graphene flake, and due to the Fano antiresonances occurring in the transmission of the graphene flake as a function of flake length and energy, it is possible to obtain a net spin current. This happens when an antiresonance for one spin channel coincides with a maximum transmission for the opposite spin. We propose these structures as a means to obtain spin-polarized currents and spin filters in graphene-based systems.

6 pages, 6 figures, submitted to Journal of Applied Physics

References in corpus (8)

• The electronic properties of graphene
• Energy Gaps in Graphene Nanoribbons
• Spin transport in proximity induced ferromagnetic graphene
• A wide band gap metal-semiconductor-metal nanostructure made entirely from graphene
• Electronic transport through bilayer graphene flakes
• Gate-controlled conductance through bilayer graphene ribbons
• Graphene nanoring as a tunable source of polarized electrons
• Electronic transport of folded graphene nanoribbons

Cited by in corpus (6)

• Electronic conductance of twisted bilayer nanoribbon flakes
• Bound states in the continuum: localization of Dirac-like fermions
• Photon-assisted transport in bilayer graphene flakes
• Enhancement of the Seebeck effect in bilayer armchair graphene nanoribbons by tuning the electric fields
• Geometry effects in topologically confined bilayer graphene loops
• Giant Magnetoresistance in Bilayer Graphene Nanoflakes