Linear-response theory of spin Seebeck effect in ferromagnetic insulators

Details Linear-response theory of spin Seebeck effect in ferromagnetic insulators Linear-response theory of spin Seebeck effect in ferromagnetic insulators

2010-10-12

arxiv.org/abs/1010.2325v2

Phys. Rev. B 83, 094410 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 3 figures. Added references and revised argument on the length scales at the end of Sec. 3

Scientific paper

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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