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arXiv 1803.03090cond-mat.mtrl-sci
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飞秒时间尺度下Co/Cu(001)界面的竞争自旋转移和耗散

Competing spin transfer and dissipation at Co/Cu(001) interfaces on femtosecond timescales

J. Chen, U. Bovensiepen, A. Eschenlohr, T. Müller, P. Elliott, E. K. U. Gross, J. K. Dewhurst, S. Sharma

摘要:

结合界面敏感的非线性磁光实验、飞秒时间分辨和从头算含时密度泛函理论,我们发现Co/Cu(001)界面的光激发自旋动力学是通过Co和Cu之间的自旋相关的电荷转移和反向转移进行的.这种超快的自旋转移与自旋轨道耦合介导的自旋角动量耗散已经在100 fs以下的时间尺度上竞争。因此,我们确定的基本微观过程中的激光诱导自旋转移在模型接口技术相关的铁磁异质结构。

英文摘要:

By combining interface-sensitive non-linear magneto-optical experiments with femtosecond time resolution and ab-initio time-dependent density functional theory, we show that optically excited spin dynamics at Co/Cu(001) interfaces proceeds via spin-dependent charge transfer and backtransfer between Co and Cu. This ultrafast spin transfer competes with dissipation of spin angular momentum mediated by spin-orbit coupling already on sub 100 fs timescales. We thereby identify the fundamental microscopic processes during laser-induced spin transfer at a model interface for technologically relevant ferromagnetic heterostructures.

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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