  We investigate the spin-resolved transport in a two-terminal zigzag graphene
nanoribbon device with two independent gate induced Rashba spin-orbit coupling
regions and in the presence of strain. By employing a recursive Green's
function technique to the tight-binding model for the graphene nanoribbon, we
calculate the spin-resolved conductance of the system. We show that by
switching the sign of one of the gates it is possible to select which spin
component will be transmitted. Moreover, our results show that an uniaxial
strain applied to the nanoribbon plays a significant role in the transport,
providing and additional manner to control the spin-polarized conductance. This
makes the present system a potential candidate for future implementations of
spin-based mechanical strain sensors.
