  The electronic pumping arising from the steady motion of ferromagnetic
skyrmions is investigated by solving the time evolution of the Schrodinger
equation implemented on a tight-binding model with the statistical physics of
the many-body problem. It is shown that the ability of steadily moving
skyrmions to pump large charge currents arises from their non-trivial magnetic
topology, i.e. the coexistence between spin-motive force and topological Hall
effect. Based on an adiabatic scattering theory, we compute the pumped current
and demonstrate that it scales with the reflection coefficient of the
conduction electrons against the skyrmion. Finally, we propose that such a
phenomenon can be exploited in the context of racetrack devices, where the
electronic pumping enhances the collective motion of the train of skyrmions.

Materials Science;Mesoscale and Nanoscale Physics