AI 中文总结
该研究以合成反铁磁斯格明子晶格为对象，结合解析建模与微磁模拟，揭示螺旋磁子边缘态与斯格明子回旋运动的非线性耦合可产生边缘局域的频率梳，证实层间反铁磁耦合可调控频率梳特性，为相干磁子信号处理提供新平台。
AI 中文摘要
合成反铁磁斯格明子晶格（SAF-SkLs）由两个铁磁斯格明子晶格反铁磁耦合、磁化强度相互补偿构成，是实现鲁棒非线性磁子学的极具潜力平台。本文结合解析建模与微磁模拟，研究SAF-SkLs中螺旋磁子频率梳（HMFC）的产生机制，结果表明：螺旋磁子边缘态与斯格明子回旋运动的非线性耦合可产生具有显著边缘局域特性的频率梳；仅当驱动频率处于螺旋边缘态能带范围内时，HMFC才会出现显著增强，而内部响应可忽略，该频率选择性证实了螺旋边缘模式在局域非线性频率转换中的关键作用；进一步研究发现，层间反铁磁耦合可重构磁子谱，从而调控频率梳的间距、梳齿数量并重新分配模式能量。本研究结果确立了SAF-SkLs作为可调谐边缘局域HMFC平台的可行性，为实现鲁棒相干磁子信号处理提供了新途径。
英文摘要
Synthetic antiferromagnetic skyrmion lattices (SAF-SkLs), consisting of two ferromagnetic SkLs coupled antiferromagnetically with compensated magnetization, provide a promising platform for robust nonlinear magnonics. Here, we investigate helical magnon frequency comb (HMFC) generation in a SAF-SkL by combining analytical modeling with micromagnetic simulations. We show that nonlinear coupling between helical magnon edge states and the skyrmion gyration produces frequency combs with pronounced edge localization. The HMFC exhibits strong enhancement exclusively when the driving frequency lies within the helical edge-state band, whereas the interior response remains negligible. This frequency selectivity confirms the essential role of helical edge modes in localized nonlinear frequency conversion. We further demonstrate that the interlayer antiferromagnetic coupling reconstructs the magnon spectrum, thereby tuning the comb spacing and the number of comb teeth while also redistributing modal energy. Our results establish SAF-SkLs as a tunable platform for edge-localized HMFCs and suggest a route toward robust coherent magnonic signal processing.
Comments7 pages, 5 figures
