晨间信号Morning Signal
《科学》 第391卷 第6781期 · 2026年1月8日 · 中文解读

磁涡旋中的自感应Floquet磁振子

Self-induced Floquet magnons in magnetic vortices
约 42 分钟Research Articles在小程序里点播,20 到 60 分钟做好
这篇讲什么
本文报道了在磁性涡旋中通过涡旋核心与微波磁振子的非线性相互作用产生自感应Floquet态,并展示了直接驱动核心或泵浦方位角磁振子模式均可诱导Floquet能带。
原文开头
Christopher Heins1,2, Lukas Körber1,2,3, Joo-Von Kim4, Thibaut Devolder4, Johan H. Mentink3, Attila Kákay1, Jürgen Fassbender1,2, Katrin Schultheiss1*, Helmut Schultheiss1* Driving condensed matter systems with periodic electromagnetic fields can result in exotic states not found in equilibrium. Termed Floquet engineering, such periodic driving applied to electronic systems can induce topological band structures and control spin interactions. In this study, we present a class of Floquet states in a magnetic vortex that arise from nonlinear interactions between the vortex core and microwave magnons. Floquet bands emerge through the periodic oscillation of the core, which can be initiated by either driving the core directly or pumping azimuthal magnon modes. …
摘自《科学》(Science)第391卷 第6781期 · 2026年1月8日。仅引用开头一小段供了解文章,版权归原刊所有,全文请阅读原刊。
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