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arXiv 2409.12142cond-mat.mes-hall
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光诱导非线性共振自旋磁化

Light-induced Nonlinear Resonant Spin Magnetization

Sayan Sarkar, Sunit Das, Debottam Mandal, Amit Agarwal

AI总结:

本研究论证了中心对称材料中光诱导非线性自旋磁化(LNSM)的可行性,揭示其量子几何起源,预测反铁磁材料CuMnAs中存在显著LNSM且其自旋磁化随圆偏振光螺旋度反转,为新型光自旋电子器件研发提供新方向。

摘要:

非平衡自旋磁化的光学产生在推动自旋电子学发展中起着关键作用,可在无需磁场的情况下实现磁化动力学的超快控制。本文中,我们论证了光诱导非线性自旋磁化(LNSM)的可行性,该效应在中心对称材料中成为主导效应。我们揭示了金属和绝缘体系中各类LNSM贡献的量子几何起源。通过详细的对称性分析,我们预测反铁磁材料CuMnAs中存在显著的LNSM。值得注意的是,在圆偏振光作用下,自旋磁化表现出螺旋度依赖行为,随光螺旋度反转而反转。这些发现为产生LNSM驱动的非线性自旋轨道力矩及开发新型光自旋电子器件开辟了新可能。

英文摘要:

The optical generation of nonequilibrium spin magnetization plays a crucial role in advancing spintronics, providing ultrafast control of magnetization dynamics without the need for magnetic fields. Here, we demonstrate the feasibility of light-induced nonlinear spin magnetization (LNSM), which becomes a dominant effect in centrosymmetric materials. We reveal the quantum geometric origins of various LNSM contributions in both metallic and insulating systems. Through detailed symmetry analysis, we predict significant LNSM in the antiferromagnetic material CuMnAs. Notably, under circularly polarized light, the spin magnetization exhibits helicity-dependent behavior, reversing with opposite light helicity. These findings open up new possibilities for generating LNSM-driven nonlinear spin-orbit torques and developing innovative opto-spintronic devices.

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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