论文标题
在具有非共线性抗铁磁性的立方自旋源中自旋电流的异常各向异性
Anomalous anisotropy of spin current in a cubic spin source with noncollinear antiferromagnetism
论文作者
论文摘要
立方材料寄主高晶体对称性，因此预计不会支持转运现象中的各向异性。与这种普遍的期望相反，我们报告说，旋转电流的异常各向异性可能会在Mn $ {_ 3} $ PT的（001）膜中出现，这是一种以面部为中心的立方体结构的非共线性反铁磁性自旋源。这种自旋电流各向异性源自交织在一起的时间逆转 - odd（$ t $ -odd）和时间逆转 - 甚至（$ t $ - eve）旋转厅效果。 Based on symmetry analyses and experimental characterizations of the current-induced spin torques in Mn${_3}$Pt-based heterostructures, we find that the spin current generated by Mn${_3}$Pt (001) exhibits exotic dependences on the current direction for all the spin components, deviating from that in conventional cubic systems.我们还证明，这种各向异性自旋电流可用于实现低功耗的自旋应用程序，例如垂直磁化的有效无场切换。
Cubic materials host high crystal symmetry and hence are not expected to support anisotropy in transport phenomena. In contrast to this common expectation, here we report an anomalous anisotropy of spin current can emerge in the (001) film of Mn${_3}$Pt, a noncollinear antiferromagnetic spin source with face-centered cubic structure. Such spin current anisotropy originates from the intertwined time reversal-odd ($T$-odd) and time reversal-even ($T$-even) spin Hall effects. Based on symmetry analyses and experimental characterizations of the current-induced spin torques in Mn${_3}$Pt-based heterostructures, we find that the spin current generated by Mn${_3}$Pt (001) exhibits exotic dependences on the current direction for all the spin components, deviating from that in conventional cubic systems. We also demonstrate that such an anisotropic spin current can be used to realize low-power spintronic applications such as the efficient field-free switching of the perpendicular magnetizations.
