论文标题
helimagnet中的手性依赖性自旋当代：手性的零场探针
Chirality-dependent spin current generation in a helimagnet: zero-field probe of chirality
论文作者
论文摘要
在磁纹理中，传导电子的自旋被迫与局部矩对齐。结果，磁纹理的拓扑以非平凡的方式影响电子动力学。一个代表性的例子是具有有限的自旋手性能的非球形旋转纹理的拓扑厅效应。电子在非球形旋转纹理中传播时，电子获得浆果相，并且它们的运动被偏转，就好像它们在磁场中一样。在这里，我们报告了共面helimagnet中的明显浆果相效应：根据helimagnet的手性，传导电子的自旋力矩在电流下极化。累积的自旋极化是自旋电流的来源，可以通过反旋转霍尔机构检测手性。该功能使我们能够在没有磁场的情况下读取手性，因此为未来的基于Helimagnet的Spintronics铺平了道路。
In a magnetic texture, the spin of a conduction electron is forced to be aligned to the localized moment. As a result, the topology of the magnetic texture affects the electron dynamics in nontrivial ways. A representative example is the topological Hall effect in noncoplanar spin textures with finite spin chirality. While propagating in the noncoplanar spin texture, electrons acquire Berry phase, and their motion is deflected as if they were in a magnetic field. Here, we report a distinct Berry phase effect in a coplanar helimagnet: the spin moment of the conduction electron is polarized under electric currents depending on the chirality of the helimagnet. The accumulated spin polarization works as a source of spin current, and the chirality can be detected by the inverse spin Hall mechanism. The functionality allows us to read out the chirality without magnetic fields, and therefore paves the way to future helimagnet-based spintronics.
