Chiral Altermagnetic Magnetoelectrics
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arXiv
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866913043696320512 |
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| author | Xie, Chengwu Meng, Weizhen Guo, Zhenzhou Zhou, Xiaodong Qian, Shifeng Yang, Tie Wang, Wenhong Cheng, Zhenxiang Wang, Xiaotian |
| author_facet | Xie, Chengwu Meng, Weizhen Guo, Zhenzhou Zhou, Xiaodong Qian, Shifeng Yang, Tie Wang, Wenhong Cheng, Zhenxiang Wang, Xiaotian |
| contents | In this work, we introduce a new class of chiral altermagnetic magnetoelectrics in structurally chiral, nonpolar altermagnetic systems and identify the experimentally well-characterized three-dimensional metal-organic framework K[Co(HCOO)$_3$] as a promising material platform. K[Co(HCOO)$_3$] exhibits chirality-locked \emph{g}-wave altermagnetic spin splitting together with dual-mode switchable electric polarization controlled by Néel-vector reorientation and structural chirality. Specifically, Néel-vector reorientation generates a finite electric polarization and reverses its sign, whereas chirality switching between left- and right-handed enantiomers produces an additional sign reversal. The associated electronic and optical responses provide effective readout channels for these switchable states. Our results establish chiral altermagnetic magnetoelectrics as a promising route to chirality- and Néel-vector-controlled nonvolatile multifunctional spintronics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_12770 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Chiral Altermagnetic Magnetoelectrics Xie, Chengwu Meng, Weizhen Guo, Zhenzhou Zhou, Xiaodong Qian, Shifeng Yang, Tie Wang, Wenhong Cheng, Zhenxiang Wang, Xiaotian Materials Science In this work, we introduce a new class of chiral altermagnetic magnetoelectrics in structurally chiral, nonpolar altermagnetic systems and identify the experimentally well-characterized three-dimensional metal-organic framework K[Co(HCOO)$_3$] as a promising material platform. K[Co(HCOO)$_3$] exhibits chirality-locked \emph{g}-wave altermagnetic spin splitting together with dual-mode switchable electric polarization controlled by Néel-vector reorientation and structural chirality. Specifically, Néel-vector reorientation generates a finite electric polarization and reverses its sign, whereas chirality switching between left- and right-handed enantiomers produces an additional sign reversal. The associated electronic and optical responses provide effective readout channels for these switchable states. Our results establish chiral altermagnetic magnetoelectrics as a promising route to chirality- and Néel-vector-controlled nonvolatile multifunctional spintronics. |
| title | Chiral Altermagnetic Magnetoelectrics |
| topic | Materials Science |
| url | https://arxiv.org/abs/2508.12770 |