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arXiv 1808.01192cond-mat.mes-hall
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远离平衡的热驱动自旋转移矩系统:通过抽运电流增强热电流

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

Tim Ludwig, Igor S. Burmistrov, Yuval Gefen, Alexander Shnirman

摘要:

我们考虑一个小的巡游铁磁体暴露在外部磁场和强烈驱动的热感生自旋电流。对于这个模型,我们推导出准经典运动方程的磁化强度的动态非平衡分布函数的影响考虑自洽。我们得到的Landau-Lifshitz-Gilbert方程补充了Slonczewski形式的自旋转移力矩项。我们确定了一个制度的持续岁差,我们发现增强的热电流的泵浦电流。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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