论文标题
用于切换手性磁纹理的非共线自旋电流
Non-Collinear Spin Current for Switching of Chiral Magnetic Textures
论文作者
论文摘要
我们提出了一个非共线自旋电流的概念，即使在非磁性晶体中，其自旋极化也会在空间上有所不同。虽然通常认为自旋霍尔电流的自旋极化是均匀的，但不对称的局部晶体电势通常使自旋极化在空间中是非共线的。基于显微镜考虑，我们证明可以观察到这样的非类别自旋霍尔电流，例如在分层的kagome mn $ _3 $ _3 $ x（x = ge，sn）化合物中。此外，通过参考原子旋转动力学模拟，我们表明，即使没有外部磁场，也可以以确定性的方式使用非共线自旋电流以确定性的方式切换Mn $ _3 $ X的手性自旋纹理。我们的理论预测可以很容易地在实验中进行测试，该实验将为非共线抗fiferromagnets中的复杂自旋结构提供新的途径。
We propose a concept of non-collinear spin current, whose spin polarization varies in space even in non-magnetic crystals. While it is commonly assumed that the spin polarization of the spin Hall current is uniform, asymmetric local crystal potential generally allows the spin polarization to be non-collinear in space. Based on microscopic considerations we demonstrate that such non-collinear spin Hall currents can be observed for example in layered Kagome Mn$_3$X (X = Ge, Sn) compounds. Moreover, by referring to atomistic spin dynamics simulations we show that non-collinear spin currents can be used to switch the chiral spin texture of Mn$_3$X in a deterministic way even in the absence of an external magnetic field. Our theoretical prediction can be readily tested in experiments, which will open a novel route toward electric control of complex spin structures in non-collinear antiferromagnets.
