  We study theoretically the effect of a rotating electric field on a diffusive
nanowire and find an effect that is analogous to spin pumping, which refers to
the generation of spin through a rotating magnetic field. The electron spin
couples to the electric field because the particle motion induces an effective
magnetic field in its rest frame. In a diffusive system the velocity of the
particle, and therefore also its effective magnetic field, rapidly and randomly
changes direction. Nevertheless, we demonstrate analytically and via a physical
argument why the combination of the two effects described above produces a
finite magnetization along the axis of rotation. This manifests as a measurable
spin-voltage in the range of tens of microvolts.
