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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2509.08254 |
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| _version_ | 1866914037792505856 |
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| author | Yang, Lijun Liang, Long |
| author_facet | Yang, Lijun Liang, Long |
| contents | Altermagnetism, a recently discovered collinear magnetic order with net zero magnetization but exhibits spin-splitting band structure, has attracted much research interest due to the rich fundamental physics and possible applications. In this work, we investigate the opto-magnetic response of $d$-wave altermagnets, focusing on the inverse Cotton-Mouton effect--the induction of static magnetization via linearly polarized light. We find that the direction of the induced magnetization is determined by the Néel vector. Moreover, its magnitude exhibits a periodic dependence on the polarization angle of the incident light, a hallmark of the system's symmetry. Our findings demonstrate that the inverse Cotton-Mouton effect provides both a method of manipulating altermagnetic magnetization in altemagnets and a probe of their intrinsic properties. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_08254 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Nonlinear opto-magnetic signature of d-wave altermagnets Yang, Lijun Liang, Long Materials Science Altermagnetism, a recently discovered collinear magnetic order with net zero magnetization but exhibits spin-splitting band structure, has attracted much research interest due to the rich fundamental physics and possible applications. In this work, we investigate the opto-magnetic response of $d$-wave altermagnets, focusing on the inverse Cotton-Mouton effect--the induction of static magnetization via linearly polarized light. We find that the direction of the induced magnetization is determined by the Néel vector. Moreover, its magnitude exhibits a periodic dependence on the polarization angle of the incident light, a hallmark of the system's symmetry. Our findings demonstrate that the inverse Cotton-Mouton effect provides both a method of manipulating altermagnetic magnetization in altemagnets and a probe of their intrinsic properties. |
| title | Nonlinear opto-magnetic signature of d-wave altermagnets |
| topic | Materials Science |
| url | https://arxiv.org/abs/2509.08254 |