Cavity-assisted magnetization switching in a quantum spin-phonon chain
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909800991817728 |
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| author | Yarmohammadi, Mohsen Oppeneer, Peter M. Freericks, James K. |
| author_facet | Yarmohammadi, Mohsen Oppeneer, Peter M. Freericks, James K. |
| contents | We propose a Néel magnetization switching mechanism in a hybrid magnon-phonon optical cavity system. A terahertz-pumped single-mode cavity photon couples to a spin-phonon chain, while the system dissipates energy via different baths. Our mean-field analysis reveals that the photon induces magnetization switching by generating strongly entangled magnon pairs with opposite momenta -- a feature weakly present in the cavity-free system. This switching occurs only at specific drive frequencies, namely at low magnon energies and near the upper edge (perpendicular modes) of the two-magnon band. Our results underscore the roles of laser fluence, damping, and photon loss in modulating the switching process, offering a promising route for cavity-assisted magnetization control in opto-spintronics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_22882 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Cavity-assisted magnetization switching in a quantum spin-phonon chain Yarmohammadi, Mohsen Oppeneer, Peter M. Freericks, James K. Strongly Correlated Electrons We propose a Néel magnetization switching mechanism in a hybrid magnon-phonon optical cavity system. A terahertz-pumped single-mode cavity photon couples to a spin-phonon chain, while the system dissipates energy via different baths. Our mean-field analysis reveals that the photon induces magnetization switching by generating strongly entangled magnon pairs with opposite momenta -- a feature weakly present in the cavity-free system. This switching occurs only at specific drive frequencies, namely at low magnon energies and near the upper edge (perpendicular modes) of the two-magnon band. Our results underscore the roles of laser fluence, damping, and photon loss in modulating the switching process, offering a promising route for cavity-assisted magnetization control in opto-spintronics. |
| title | Cavity-assisted magnetization switching in a quantum spin-phonon chain |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2503.22882 |