Observation of the antiferromagnetic spin Hall effect
Observation of the antiferromagnetic spin Hall effect
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反铁磁自旋霍尔效应的观察
DOI：
10.1038/s41563-021-00946-z
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发表时间：
2021-02-25
期刊：
影响因子：
41.2
通讯作者：
Pan, Feng
中科院分区：
文献类型：
--
作者：
Chen, Xianzhe;Shi, Shuyuan;Pan, Feng
自旋霍尔效应(1)的发现使得自旋电流的有效产生和操纵成为可能。最近，在非共线反铁磁体中观察到磁自旋霍尔效应（2,3），其中由于非共线自旋构型，自旋守恒被破坏。这为通过可控磁化控制自旋电流和相关器件性能提供了独特的机会。在这里，我们报告了共线反铁磁体 Mn2Au 中的磁自旋霍尔效应。自旋电流在两个空间对称性破缺的自旋亚晶格处产生，反平行反铁磁矩起着重要作用。因此，我们将这种效应称为“反铁磁自旋霍尔效应”。反铁磁自旋霍尔效应产生的面外自旋有利于垂直磁化器件的有效切换，这是高密度应用所需的。反铁磁自旋霍尔效应通过反铁磁自旋结构为自旋电流的原子级控制增加了另一种扭曲。
The discovery of the spin Hall effect(1) enabled the efficient generation and manipulation of the spin current. More recently, the magnetic spin Hall effect(2,3) was observed in non-collinear antiferromagnets, where the spin conservation is broken due to the non-collinear spin configuration. This provides a unique opportunity to control the spin current and relevant device performance with controllable magnetization. Here, we report a magnetic spin Hall effect in a collinear antiferromagnet, Mn2Au. The spin currents are generated at two spin sublattices with broken spatial symmetry, and the antiparallel antiferromagnetic moments play an important role. Therefore, we term this effect the 'antiferromagnetic spin Hall effect'. The out-of-plane spins from the antiferromagnetic spin Hall effect are favourable for the efficient switching of perpendicular magnetized devices, which is required for high-density applications. The antiferromagnetic spin Hall effect adds another twist to the atomic-level control of spin currents via the antiferromagnetic spin structure.