Magnetic Monopole Generated by Spin Damping with Spin-Orbit Coupling
Magnetic Monopole Generated by Spin Damping with Spin-Orbit Coupling
复制标题
通过自旋阻尼和自旋轨道耦合产生磁单极子
DOI：
10.1088/1742-6596/400/4/042058
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Gen Tatara
中科院分区：
文献类型：
--
作者：
Akihito Takeuchi;Gen Tatara
本文从理论上研究了磁系统中的磁振荡。在受挫折的磁性材料中出现了刺猬型磁共振。此外，在自旋轨道相互作用的存在下，磁化动力学诱导了一种新的磁共振。为了推导出这样的磁场，我们基于量子多体理论解析地计算电流。由此定义了驱动电流的有效电场和有效磁场，最后得到了这些有效场所遵循的具有磁致伸缩贡献的麦克斯韦方程组。
We investigate theoretically the magnetic monopole in magnetic systems. The hedgehog monopole emerges in frustrated magnetic materials. In addition, a novel magnetic monopole is induced by magnetization dynamics in the presence of the spin-orbit interaction. To derive such a magnetic monopole, we calculate an electric current analytically based on the quantum many-body theory. From the result, we define effective electric and magnetic fields which drive the electric current and finally we obtain the Maxwell's equations with the magnetic monopole contribution which these effictive fields follow.