AI 中文总结
该研究提出光驱动高次谐波可分辨共面手性孤子晶格的实空间特征，揭示其自旋扭转的晶格尺度结构，为相关磁结构表征提供新方法。
AI 中文摘要
施加于单轴手性螺旋磁体螺旋轴垂直方向的磁场会将自旋螺旋压缩为共面手性孤子晶格（CSL）。我们表明，由耦合到冻结CSL的巡游电子产生的光驱动高次谐波，可分辨局域扭转的晶格尺度结构，而非连续孤子形状。对于均匀螺旋，高次谐波保持微扰特性；当缠绕局域于固定磁周期时，高次谐波强度增长多个数量级，并对驱动振幅呈现非微扰依赖。这种增长源于空间非均匀的有效跳跃，该效应使每个孤子成为跳跃振幅的局域凹陷。当缠绕局域度固定时，随着磁周期向连续极限增大，高次谐波强度下降多个数量级，此时跳跃调制在空间上被平滑。因此，高次谐波可分辨共面CSL的实空间特征，即便在无标量手性和 emergent 磁场的情况下也可实现。
英文摘要
A magnetic field applied perpendicular to the helical axis of a monoaxial chiral helimagnet compresses the spin helix into a coplanar chiral soliton lattice (CSL). We show that optically driven high-harmonic generation from itinerant electrons coupled to a frozen CSL resolves the lattice-scale structure of the localized twist, rather than the continuum soliton shape. High-order harmonics remain perturbative for the uniform helix. As the winding localizes at fixed magnetic period, they grow by many orders of magnitude and acquire a nonperturbative dependence on the drive amplitude. The growth originates from a spatially nonuniform effective hopping that turns each soliton into a localized dip in the hopping amplitude. When the degree of winding localization is held fixed, high-order intensities fall by many orders of magnitude as the magnetic period increases toward the continuum limit, where the hopping modulation is spatially smoothed. High-order harmonics thus resolve a real-space characteristic of the coplanar CSL, even in the absence of scalar chirality and an emergent magnetic field.
Comments9 pages, 6 figures
