AI 中文总结
本研究在GdRu₂Ge₂的五个磁性相（含两个纳米斯格明子晶体相）中，揭示了Gd 4f自旋多Q磁性与Ru 4d轨道多Q织构的关联，为非共线巡游磁体的电荷自旋交织提供了微观视角。
AI 中文摘要
中心对称晶体中非共线磁性的稳定机制仍不明确，但可能涉及巡游电子介导的自旋-自旋相互作用，例如RKKY相互作用。有限Q磁序可能伴随电子调制，可通过扫描隧道显微镜观测。在GdRu₂Ge₂的五个连续磁性相（包括两个纳米级斯格明子晶体相）中，我们发现Gd 4f自旋间的多Q磁性，对应于贡献巡游电子能带的Ru 4d轨道形成的多Q织构。通过对每种电子织构基元的原子分辨图像，以及基于 underlying自旋结构的简单数值建模方案，我们推断出二者的关键关联：Gd方形网格的两个键心亚晶格上，最近邻Gd自旋的排列与Ru 4d轨道的局域态密度紧密相关。这些分析为非共线巡游磁体中原子尺度电荷与自旋自由度的交织提供了微观视角。
英文摘要
The mechanisms stabilizing non-collinear magnetism in centrosymmetric crystals remain unclear, but likely involve spin-spin interactions mediated by itinerant electrons, such as the RKKY interaction. Finite-$Q$ magnetic order may then be accompanied by electronic modulations that are observable using a scanning tunneling microscope. In five successive magnetic phases of GdRu$_{2}$Ge$_{2}$, including two nano-scale skyrmion crystal phases, we show that multi-$Q$ magnetism among Gd 4$f$ spins entails a corresponding multi-$Q$ texture among the Ru 4$d$ orbitals that contribute itinerant electron bands. With atomically-resolved images of each electronic texture's motif, and a simple numerical modeling scheme drawing on the underlying spin structures, we infer their key relationship: The alignment between nearest-neighbor Gd spins tightly correlates with the local density-of-states of the Ru 4$d$ orbitals on the two bond-centered sublattices of the Gd square net. These analyses offer a microscopic view of the atomic-scale intertwining of charge and spin degrees-of-freedom in non-collinear itinerant magnets.
Comments10 pages, 6 figures (plus 12 pages, 9 figures)
