▎ 摘　　要

We studied spin-dependent transport in monolayer graphene with a spin-orbit barrier, a narrow strip in which the spin-orbit interaction is not zero. When the Fermi energy is between the two spin-split bands, the structure can be used to generate spin-polarized current. For a strong enough Rashba strength, a thick enough barrier or a low enough Fermi energy, highly spin-polarized current is generated (polarization similar to 0.7-0.85). Under these conditions, the spin direction of the transmitted electron is approximately perpendicular to the direction of motion. This shows that graphene spin-orbit nanostructures are useful for the development of graphene spintronic devices. (C) 2013 Elsevier B.V. All rights reserved.