论文标题
成像巡回电子和中心对称磁铁磁铁GDRU2SI2中的局部矩之间的耦合
Imaging the coupling between itinerant electrons and localised moments in the centrosymmetric skyrmion magnet GdRu2Si2
论文作者
论文摘要
磁性天空被认为仅在反式对称性断裂结构中才能稳定，但是最近在基于对称的GD化合物中发现了Skyrmion Lattices，这激发了有关稳定性机制的问题。最近的理论建议的自然后果，即巡回电子和局部磁矩之间的耦合，是使用即使是非磁性探针（例如光谱示踪扫描隧道隧道胶囊）（SI-STM）的Skyrmions进行检测。在这里，gdru $ _2 $ si $ _2 $的SI-STM观察揭示了在局部密度的模式，这些状态确实随着基础磁性结构而变化。这些模式是通过模型计算在定性上复制的，这些计算假设巡回电子和局部矩之间交换耦合。这些发现提供了一个线索，以了解GDRU $ _2 $ SI $ _2 $中的Skyrmion形成机制。
Magnetic skyrmions were thought to be stabilised only in inversion-symmetry breaking structures, but skyrmion lattices were recently discovered in inversion symmetric Gd-based compounds, spurring questions of the stabilisationmechanism. A natural consequence of a recent theoretical proposal, a coupling between itinerant electrons and localised magnetic moments, is that the skyrmions are amenable to detection using even non-magnetic probes such as spectroscopic-imaging scanning tunnellingmicroscopy (SI-STM). Here SI-STM observations of GdRu$_2$Si$_2$ reveal patterns in the local density of states that indeed vary with the underlying magnetic structures. These patterns are qualitatively reproduced by model calculations which assume exchange coupling between itinerant electrons and localised moments. These findings provide a clue to understand the skyrmion formation mechanism in GdRu$_2$Si$_2$.
