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arXiv 0705.3502cond-mat.mes-hall
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由非微扰SU引起的局域自旋动力学(2)自旋轨道效应的规范场

Local spin dynamic arising from the non-perturbative SU(2) gauge field of the spin orbit effect

S. G. Tan, M. B. A. Jalil, Xiong-Jun Liu

摘要:

我们用非微扰规范场方法研究了自旋轨道耦合对磁矩动力学的影响。给出了一个统一的运动方程,它统一了由SU(2)自旋规范场导出的自旋轨道耦合效应和由拓扑U(1)xU(1)旋转规范场导出的矩手征效应.我们提出了一个修正的Landau-Liftshitz-Gilbert方程,并讨论了修正的EOM在各种技术应用中的意义,如自旋阀多层膜中的电流感应开关和磁矩的轨迹,磁存储器和稀磁半导体.

英文摘要:

We use the non-perturbative gauge field approach to study the effects of spin orbit coupling on the dynamic of magnetic moment. We present a general equation of motion (EOM) which unifies i) the spin orbit coupling effect derived from the SU(2) spin gauge field, and ii) the moment chirality effect previously derived from the topological U(1)xU(1) rotation gauge under the adiabatic condition. We present a modified Landau-Liftshitz-Gilbert equation and discuss the implication of the modified EOM in various technological applications, such as current-induced switching and trajectory of magnetic moments in spin-valve multilayers, magnetic memory and diluted magnetic semiconductor.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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