Observation of spin splitting torque in a collinear antiferromagnet RuO2

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)...

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Bibliographic Details
Published inarXiv.org
Main Authors Bai, Hua, Han, Lei, Feng, Xiaoyu, Zhou, Yongjian, Wang, Qian, Zhu, Wenxuan, Chen, Xianzhe, Pan, Feng, Fan, Xiaolong, Cheng, Song
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 25.04.2022
Subjects
Antiferromagnetism
Crystal structure
Physics - Materials Science
Polarization (spin alignment)
Ruthenium oxide
Spintronics
Splitting
Torque
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.2109.05933