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Regular version of the site

Article

A thermally driven spin-transfer-torque system far from equilibrium: enhancement of the thermoelectric current via pumping current

Physical Review B: Condensed Matter and Materials Physics. 2019. Vol. 99. No. 045429. P. 045429-1-045429-16.
Burmistrov I., Ludwig T., Gefen Y., Shnirman A.

We consider a small itinerant ferromagnet exposed to an external magnetic field and strongly driven by a thermally induced spin current. For this model, we derive the quasi-classical equations of motion for the magnetization where the effects of a dynamical non-equilibrium distribution function are taken into account self-consistently. We obtain the Landau-Lifshitz-Gilbert equation supplemented by a spin-transfer torque term of Slonczewski form. We identify a regime of persistent precessions in which we find an enhancement of the thermoelectric current by the pumping current.