Linear-response theory of spin Seebeck effect in ferromagnetic insulators

被引:232
|
作者
Adachi, Hiroto [1 ,2 ]
Ohe, Jun-ichiro [1 ,2 ]
Takahashi, Saburo [1 ,2 ,3 ]
Maekawa, Sadamichi [1 ,2 ]
机构
[1] Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan
[2] Japan Sci & Technol Agcy, CREST, Tokyo 1020075, Japan
[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
来源
PHYSICAL REVIEW B | 2011年 / 83卷 / 09期
关键词
FLUCTUATIONS; DIMENSIONS; TRANSPORT; DYNAMICS;
D O I
10.1103/PhysRevB.83.094410
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
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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页数:6
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