Rashba spin-orbit-interaction-based quantum pump in graphene
  We present a proposal for an adiabatic quantum pump based on a graphene monolayer patterned by electrostatic gates and operated in the low-energy Dirac regime. The setup under investigation works in the presence of inhomogeneous spin-orbit interactions of intrinsic- and Rashba-type and allows to generate spin polarized coherent current. A local spin polarized current is induced by the pumping mechanism assisted by the spin-double refraction phenomenon. 
Dario Bercioux, Daniel F. Urban, Francesco Romeo, and Roberta Citro
cond-mat.mes-hall