论文标题
磁性单孔和自旋轨道耦合系统中的偏斜散射
Skew scattering by magnetic monopoles and anomalous Hall effect in spin-orbit coupled systems
论文作者
论文摘要
诸如天际和域壁与巡回电子相连的磁纹理产生了丰富的运输现象，例如异常大厅效应和非偏射电流。一个有趣的情况是，何时传输系数与磁纹理的全局（或拓扑）特性有关，例如Skyrmion和域壁数。从应用中，这种现象也很有趣，其中传输现象是检测纳米尺度设备中磁纹理的潜在探针。在这里，我们表明，当磁性纹理伴侣与旋转的磁性电子与自旋轨道相互作用的非中心对称系统中的巡回电子相关时，与净磁单单极电荷成正比发生异常的大厅效应。尽管没有平面磁矩，但这种机制在铁磁域壁上产生了有限的异常霍尔效应，该壁的旋转在$ xy $平面上旋转。我们还讨论了有助于异常大厅效应的磁纹理与晶体对称性之间的关系。结果表明，富含自旋轨道相互作用和磁纹理的相互作用以及它们在纳米级设备中检测各种磁纹理的潜力而产生的丰富特征。
Magnetic textures like skyrmions and domain walls coupled to itinerant electrons give rise to rich transport phenomena such as anomalous Hall effect and nonreciprocal current. An interesting case is when the transport coefficient is related to the global (or topological) property of the magnetic texture, e.g., skyrmion and domain wall numbers. Such phenomena are also interesting from applications, in which the transport phenomena are potential probes for electrically detecting magnetic textures in nano-scale devices. Here, we show that an anomalous Hall effect proportional to the net magnetic monopole charge occurs from skew scattering when the magnetic texture couples to itinerant electrons in a non-centrosymmetric system with spin-orbit interaction. This mechanism gives rise to a finite anomalous Hall effect in a ferromagnetic domain wall whose spins rotate in the $xy$ plane, despite no out-of-plane magnetic moment. We also discuss the relation between the magnetic texture contributing to the anomalous Hall effect and the crystal symmetry. The results demonstrate rich features arising from the interplay of spin-orbit interaction and magnetic textures and their potential for detecting various magnetic textures in nanoscale devices.
