具有自旋轨道耦合的奇宇称磁体中的光磁开关
Optical Magnetic Switching in Odd-Parity Magnets with Spin-Orbit Coupling
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中文总结 AI 辅助
研究具有自旋轨道耦合的奇宇称磁体中的光磁开关，利用椭圆偏振光实现零净磁化p波状态的动态切换，弗洛凯工程能带获非零陈数，圆偏振光对f波磁体有相应效应，确立光为控制磁态有效手段，有自旋电子学和量子信息应用潜力。
中文摘要 AI 辅助
p波磁体在动量空间中表现出奇宇称自旋极化，自旋分裂在\(\vec{k}\rightarrow -\vec{k}\)下反转，同时保持净磁化为零。本文表明，在具有自旋轨道耦合的奇宇称磁体中，椭圆偏振光产生一个与动量无关的自旋相关项，可将零净磁化的p波状态动态切换为有限自旋极化状态。弗洛凯工程能带也获得非零陈数，其符号由光极化控制。对于f波磁体，圆偏振光会诱导出平面外净磁化，这提供了直接的实验特征。我们的结果确立了光作为控制磁态的有效手段，在自旋电子学和量子信息中有潜在应用。
英文摘要
$p$-wave magnets exhibit odd-parity spin polarization in momentum space, with spin splitting that reverses under $\vec{k}\rightarrow -\vec{k}$, while preserving zero net magnetization. Here we show that, in odd-parity magnets with spin-orbit coupling, elliptically polarized light generates a momentum-independent spin-dependent term that dynamically switches a zero-net-magnetization $p$-wave state into a finite spin-polarized state. The Floquet-engineered bands also acquire a nonzero Chern number whose sign is controlled by the light polarization. For $f$-wave magnets, circularly polarized light induces a net out-of-plane magnetization, offering a direct experimental signature. Our results establish light as an efficient means of controlling magnetic states, with potential applications in spintronics and quantum information.
