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arXiv 2109.05933cond-mat.mtrl-sci
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共线反铁磁体RuO2自旋分裂矩的观测

Observation of spin splitting torque in a collinear antiferromagnet RuO2

Hua Bai, Lei Han, Xiaoyu Feng, Yongjian Zhou, Qian Wang, Wenxuan Zhu, Xianzhe Chen, Feng Pan, Xiaolong Fan, Cheng Song

摘要:

电流感应自旋力矩为磁存储器提供了有效的数据写入方法。最近,自旋分裂力矩(SST)的理论预测(R。González-Hernández et al. Phys. Rev. Lett. 126,127701(2021)),其结合了常规自旋转移矩(STT)和自旋轨道矩(SOT)的优点,并且能够实现可控的自旋极化。在这里,我们提供了共线反铁磁RuO_2薄膜的SST的实验证据。自旋电流方向与RuO 2的晶体取向有关,自旋极化方向与Néel矢量有关。这些特征对于预测的SST来说是相当典型的。我们的发现不仅为自旋力矩的研究提供了一个新的成员,而且为自旋电子学提供了一个很有前途的自旋源RuO 2。

英文摘要:

Current-induced spin torques provide efficient data writing approaches for magnetic memories. Recently, the spin splitting torque (SST) was theoretically predicted (R. González-Hernández et al. Phys. Rev. Lett. 126, 127701 (2021)), which combines advantages of conventional spin transfer torque (STT) and spin-orbit torque (SOT) as well as enables controllable spin polarization. Here we provide the experimental evidence of SST in collinear antiferromagnet RuO2 films. The spin current direction is found to be correlated to the crystal orientation of RuO2 and the spin polarization direction is dependent on (parallel to) the Néel vector. These features are quite characteristic for the predicted SST. Our finding not only present a new member for the spin torques besides traditional STT and SOT, but also proposes a promising spin source RuO2 for spintronics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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