AI 中文总结
研究通过纳米级石墨烯结中斯格明子晶体对磁振子输运的影响，利用磁振子计数波动探究其动力学，建立了对量子霍尔型绝缘基态拓扑自旋纹理的实空间探测，为石墨烯系统拓扑有序相研究提供机会。
AI 中文摘要
尽管单个斯格明子是拓扑保护对象，但其协作晶体序很脆弱，易受热涨落或其他外部扰动破坏。探测这种晶体的内部动力学既引人注目又具有挑战性，因为其复杂精细的自旋纹理在测量期间必须保持稳定。我们设计了一个纳米级石墨烯结，其中包含一个斯格明子维格纳晶体，嵌入在磁振子发射器和探测器之间。斯格明子晶体几何结构在磁振子输运上留下显著印记：随着栅极电压变化，在整个样品中检测到磁振子计数急剧波动的近周期窗口。我们提出一种解释，这是由于斯格明子逐个添加到准一维阵列中导致的。每次波动爆发对应一个额外斯格明子的进入，此时晶格刚度降低。入射磁振子诱导并充当晶体非平衡集体动力学的探针。这些结果通过磁振子输运建立了对量子霍尔型绝缘基态中拓扑自旋纹理的实空间探测，并为探索莫尔和多层石墨烯系统中的相关拓扑有序相提供了机会。
英文摘要
Although individual skyrmions are topologically protected objects, their cooperative crystalline order is fragile, easily disrupted by thermal fluctuations or other external perturbations. Probing the internal dynamics of such a crystal is both compelling and challenging, as its intricate and delicate spin texture must remain stable during measurement. Here, we engineer a nanoscale graphene junction hosting a skyrmion Wigner crystal, embedded between magnon emitters and detectors. The skyrmion crystal geometry leaves a striking imprint on magnon transport: as the gate voltage is varied, near-periodic windows of sharp fluctuations in magnon count are detected across the entire sample. We develop an interpretation that this results from skyrmions being added one by one to a quasi-one-dimensional array. Each burst of the fluctuations thus corresponds to the entry of an additional skyrmion, during which the lattice stiffness reduces. The impinging magnons induce and act as a probe of non-equilibrium collective dynamics of the crystal. These results establish a real-space probe of topological spin textures in quantum Hall-type insulating ground states via magnon transport and open opportunities to explore correlated, topologically ordered phases in moire and multilayer graphene systems.
