Nonvolatile Magnonics in Bilayer Magnetic Insulators
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866910782120263680 |
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| author | Ni, Jinyang Zhang, Zhenlong Lu, Jinlian Du, Quanchao Jiang, Zhijun Bellaiche, Laurent |
| author_facet | Ni, Jinyang Zhang, Zhenlong Lu, Jinlian Du, Quanchao Jiang, Zhijun Bellaiche, Laurent |
| contents | Nonvolatile control of spin order or spin excitations offers a promising avenue for advancing spintronics; however, practical implementation remains challenging. In this letter, we propose a general framework to realize electrical control of magnons in 2D magnetic insulators. We demonstrate that in bilayer ferromagnetic insulators with strong spin-layer coupling, electric field Ez can effectively manipulate the spin exchange interactions between the layers, enabling nonvolatile control of the corresponding magnons. Notably, in this bilayer, Ez can induce nonzero Berry curvature and orbital moments of magnons, the chirality of which are coupled to the direction of Ez. This coupling facilitates Ez manipulate the corresponding magnon valley and orbital Hall currents. Furthermore, such bilayers can be easily engineered, as demonstrated by our density-functional-theory calculations on Janus bilayer Cr-based ferromagnets. Our work provides an important step toward realizing nonvolatile magnonics and paves a promising way for future magnetoelectric coupling devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_07218 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Nonvolatile Magnonics in Bilayer Magnetic Insulators Ni, Jinyang Zhang, Zhenlong Lu, Jinlian Du, Quanchao Jiang, Zhijun Bellaiche, Laurent Materials Science Other Condensed Matter Nonvolatile control of spin order or spin excitations offers a promising avenue for advancing spintronics; however, practical implementation remains challenging. In this letter, we propose a general framework to realize electrical control of magnons in 2D magnetic insulators. We demonstrate that in bilayer ferromagnetic insulators with strong spin-layer coupling, electric field Ez can effectively manipulate the spin exchange interactions between the layers, enabling nonvolatile control of the corresponding magnons. Notably, in this bilayer, Ez can induce nonzero Berry curvature and orbital moments of magnons, the chirality of which are coupled to the direction of Ez. This coupling facilitates Ez manipulate the corresponding magnon valley and orbital Hall currents. Furthermore, such bilayers can be easily engineered, as demonstrated by our density-functional-theory calculations on Janus bilayer Cr-based ferromagnets. Our work provides an important step toward realizing nonvolatile magnonics and paves a promising way for future magnetoelectric coupling devices. |
| title | Nonvolatile Magnonics in Bilayer Magnetic Insulators |
| topic | Materials Science Other Condensed Matter |
| url | https://arxiv.org/abs/2501.07218 |