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arXiv 1706.09332cond-mat.mes-hall
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自旋珀耳帖效应理论

Theory of spin Peltier effect

Y. Ohnuma, M. Matsuo, S. Maekawa

摘要:

基于非平衡格林函数方法,提出了一种由顺磁金属(PM)和铁磁绝缘体(FI)组成的双层结构中自旋珀耳帖效应的微观理论。由温度梯度和自旋积累驱动的自旋电流和热流被表示为PM和FI中自旋磁化率的函数,并由Onsager的相互关系总结。通过使用目前的公式,我们估计在界面处的热生成和吸收驱动的热电流注入介导的自旋从PM到FI。

英文摘要:

A microscopic theory of the spin Peltier effect in a bilayer structure comprising a paramagnetic metal (PM) and a ferromagnetic insulator (FI) based on the nonequilibrium Green's function method is presented. Spin current and heat current driven by temperature gradient and spin accumulation are formulated as functions of spin susceptibilities in the PM and the FI, and are summarized by Onsager's reciprocal relations. By using the current formulae, we estimate heat generation and absorption at the interface driven by the heat-current injection mediated by spins from PM into FI.

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