Nonlinear Magnetic Orbital Hall Effect Induced by Spin-Orbit Coupling
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arXiv
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| Format: | Preprint |
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2026
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| author | Wang, Hui Liu, Huiying Ge, Yanfeng Feng, Xukun Zhu, Jiaojiao Cao, Jin Xiao, Cong Yang, Shengyuan A. Ang, Lay Kee |
| author_facet | Wang, Hui Liu, Huiying Ge, Yanfeng Feng, Xukun Zhu, Jiaojiao Cao, Jin Xiao, Cong Yang, Shengyuan A. Ang, Lay Kee |
| contents | Electrical readout of 180$^\circ$ switching in strictly compensated collinear antiferromagnets remains a major challenge in antiferromagnetic spintronics. Electrical writing of perpendicularly magnetized ferromagnets by out-of-plane orbital torque remains an important challenge in orbitronics. In this work, we propose a second-order nonlinear magnetic orbital Hall effect in the source antiferromagnet as a simultaneous recipe for both difficulties. This orbitronics effect is induced by spin-orbit coupling and is odd in the Néel vector, thus is a unique effect that integrates both functionalities via electric control of the Néel vector in the source antiferromagnet. Our first-principles calculations in CuMnAs predict significant non-perturbative orbital effects from spin-orbit coupling, with a orbital Berry-curvature dipole mechanism. These findings unveil new possibilities opened by topological antiferromagnetic orbitronics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_02636 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Nonlinear Magnetic Orbital Hall Effect Induced by Spin-Orbit Coupling Wang, Hui Liu, Huiying Ge, Yanfeng Feng, Xukun Zhu, Jiaojiao Cao, Jin Xiao, Cong Yang, Shengyuan A. Ang, Lay Kee Materials Science Electrical readout of 180$^\circ$ switching in strictly compensated collinear antiferromagnets remains a major challenge in antiferromagnetic spintronics. Electrical writing of perpendicularly magnetized ferromagnets by out-of-plane orbital torque remains an important challenge in orbitronics. In this work, we propose a second-order nonlinear magnetic orbital Hall effect in the source antiferromagnet as a simultaneous recipe for both difficulties. This orbitronics effect is induced by spin-orbit coupling and is odd in the Néel vector, thus is a unique effect that integrates both functionalities via electric control of the Néel vector in the source antiferromagnet. Our first-principles calculations in CuMnAs predict significant non-perturbative orbital effects from spin-orbit coupling, with a orbital Berry-curvature dipole mechanism. These findings unveil new possibilities opened by topological antiferromagnetic orbitronics. |
| title | Nonlinear Magnetic Orbital Hall Effect Induced by Spin-Orbit Coupling |
| topic | Materials Science |
| url | https://arxiv.org/abs/2604.02636 |