Microscopic formulation of nonlinear spin current induced by spin pumping
Microscopic formulation of nonlinear spin current induced by spin pumping
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DOI：
10.1016/j.jmmm.2018.12.061
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发表时间：
2019-04
影响因子：
2.7
通讯作者：
Mai Kameda;D. Hirobe;S. Daimon;Y. Shiomi;S. Takahashi;E. Saitoh
中科院分区：
文献类型：
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作者：
Mai Kameda;D. Hirobe;S. Daimon;Y. Shiomi;S. Takahashi;E. Saitoh
通过数值计算三磁振子和四磁振子相互作用对磁振子数随时间的变化，研究了自旋抽运的非线性效应。结果表明，三磁振子相互作用导致自旋抽运自旋流的增强。我们还发现，四磁振子相互作用和三磁振子相互作用的结合可以解释实验观察到的自旋电流的低频振荡。
Nonlinear effects of spin pumping have been investigated by numerically calculating the temporal evolution of the magnon number affected by three- and four-magnon interactions. We showed that the three-magnon interaction gives rise to the enhancement of spin-pumping spin current. We also found that the four-magnon interaction in combination with the three-magnon interaction can be responsible for the experimentally observed low-frequency oscillation of spin current.