Spin torque and Nernst effects in Dzyaloshinskii-Moriya ferromagnets
Spin torque and Nernst effects in Dzyaloshinskii-Moriya ferromagnets
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DOI：
10.1103/physrevb.93.161106
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发表时间：
2015-09
影响因子：
3.7
通讯作者：
A. Kovalev;V. Zyuzin
中科院分区：
文献类型：
--
作者：
A. Kovalev;V. Zyuzin
在这里，我们预测，温度梯度可以诱导一个磁振子介导的内转矩系统中的一个非平凡的磁振子贝里曲率。借助非平衡磁振子介导的扭矩和自旋电流的微观线性响应理论，我们确定了带间和带内的组成部分，表现在铁磁体与Dzyaloshinskiii-Moriya相互作用和磁纹理。为了说明和评估这些影响的重要性，我们应用线性响应理论的磁振子介导的自旋能斯特和转矩的反应，在一个戈薇晶格铁磁体。
Here, we predict that a temperature gradient can induce a magnon-mediated intrinsic torque in systems with a nontrivial magnon Berry curvature. With the help of a microscopic linear response theory of nonequilibrium magnon-mediated torques and spin currents we identify the interband and intraband components that manifest in ferromagnets with Dzyaloshinskii-Moriya interactions and magnetic textures. To illustrate and assess the importance of such effects, we apply the linear response theory to the magnon-mediated spin Nernst and torque responses in a kagome lattice ferromagnet.