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arXiv 2602.09738cond-mat.mes-hall
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高阶谐波自旋与电荷泵浦在交替磁体中的出现

High-Harmonic Spin and Charge Pumping in Altermagnets

Université de Nouakchott(努瓦克肖特大学)

Ousmane Ly

AI总结:

研究揭示了交替磁体在磁动力驱动下产生强非线性自旋与电荷泵浦现象,其非相对论自旋-动量耦合导致巨量动量依赖自旋分裂,产生强自旋翻转散射,模拟显示在现实条件下可发射数百个谐波,幅度远超光驱动方案,证明交替磁体内在支持高阶谐波自旋与电荷泵浦。

摘要:

我们报告了在交替磁体系统中由磁动力驱动出现的高非线性自旋和电荷泵浦现象。交替磁体(AMs)内固有的非相对论自旋-动量耦合产生巨量动量依赖自旋分裂,在预倾磁序驱动AM系统非平衡状态下产生强自旋翻转散射。我们的模拟显示在现实条件下可发射数百个谐波,其幅度远超光驱动方案。值得注意的是,与铁磁和传统反铁磁系统不同,后者通常需要额外的自旋轨道耦合才能产生非线性发射,而AMs内在支持高阶谐波自旋与电荷泵浦。这些结果将交替磁体系统识别为高效太赫兹发射器和高非线性自旋电子器件的有前景平台。

英文摘要:

We report the emergence of highly nonlinear spin and charge pumping in an altermagnetic system driven by magnetic dynamics. The non-relativistic spin-momentum coupling inherent to altermagnets (AMs) generates a giant momentum dependent spin splitting, leading to strong spin-flip scattering in the presence of a precessing magnetic order driving the altermagnetic system out of equilibrium. Our simulations reveal the emission of hundreds of harmonics under realistic conditions, with amplitudes far exceeding those obtained in light-driven schemes. Notably, in contrast to ferromagnetic and conventional antiferromagnetic systems, where nonlinear emission typically requires additional spin-orbit coupling, AMs intrinsically support high-harmonic spin and charge pumping. These results identify altermagnetic systems as a promising platform for efficient THz emitters and highly nonlinear 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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