论文标题
高度各向异性的几何大厅通过掺杂的pyrochlore molybdates中的F-D交换场效应
Highly anisotropic geometrical Hall effect via f-d exchange fields in doped pyrochlore molybdates
论文作者
论文摘要
当传导电子伴侣与非旋转局部磁矩融合时，将施加Realspace浆果曲率引起几何霍尔效应，这不仅与磁化成正比。到目前为止，已经在传导电子的sblattice上存在非旋转磁顺序的情况下已确定。在这里，我们证明，即使没有远程传导电子的远距离磁性顺序，几何霍尔的效果也会从局部磁矩，在孔掺杂的植物phyrochlore molybdates中引起。我们发现，几何霍尔效应相对于应用的磁场方向明显各向异性，这与局部TB矩的真实空间标量旋转手性的磁场相关幅度和符号变化非常相似。这些结果可能有助于理解由于传导电子与局部自旋之间在广泛材料类别中的近关系耦合引起的新出现电磁反应。
When a conduction electron couples with a non-coplanar localized magnetic moment, the realspace Berry curvature is exerted to cause the geometrical Hall effect, which is not simply proportional to the magnetization. So far, it has been identified in the case mostly where the non-coplanar magnetic order is present on the sublattice of conduction electrons. Here, we demonstrate that the geometrical Hall effect shows up even without long-range magnetic order of conduction electrons, as induced by non-coplanar exchange fields from the localized magnetic moments, in hole-doped phyrochlore molybdates. We find that the geometrical Hall effect is markedly anisotropic with respect to the applied magnetic field direction, which is in good accordance with the field-dependent magnitude and sign change of the real-space scalar spin chirality of local Tb moments. These results may facilitate the understanding of emergent electromagnetic responses induced by the Kondo-like coupling between conduction electrons and local spins in a broad material class.
