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Linear-response theory of spin Seebeck effect in ferromagnetic insulators

Adachi, Hiroto; Oe, Junichiro; Takahashi, Saburo; Maekawa, Sadamichi

We formulate a linear response theory of the spin Seebeck effect, i.e., a spin voltage generation from heat current flowing in a ferromagnet. Our approach focuses on the collective magnetic excitation of spins, i.e., magnons. We show that the linear-response formulation provides us with a qualitative as well as quantitative understanding of the spin Seebeck effect observed in a prototypical magnet, yttrium iron garnet.

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Category:Materials Science, Multidisciplinary

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