Switchable Magnonic Crystals Based on Spin Crossover/CrSBr Heterostructures
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915685650661376 |
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| author | Shumilin, Andrei Dey, Sourav Coltuneac, Denisa Stoleriu, Laurentiu Baldoví, José J. |
| author_facet | Shumilin, Andrei Dey, Sourav Coltuneac, Denisa Stoleriu, Laurentiu Baldoví, José J. |
| contents | The progress of magnonics ultimately depends on material platforms that offer precise control of spin waves propagation. Here, we put forward a chemical strategy to create locally tunable magnonic crystals by integrating switchable spin-crossover (SCO) molecules with 2D van der Waals magnets. Specifically, we investigate from first principles a hybrid molecular/2D heterostructure formed by [Fe((3,5-(CH3)2Pz)3BH)2] molecules (Fe-pz) deposited on a single-layer of semiconducting CrSBr. We show that Fe-pz molecules are stable on CrSBr while preserving its SCO bistability, particularly in densely packed molecular arrays. By patterning Fe-pz into periodic stripes separated by pristine CrSBr regions, the interface becomes a magnonic crystal that filters spin waves at selected frequencies. Crucially, light-driven excited spin-state trapping (LIESST) enables LS-HS switching and induces up to ~1.3% local strain in CrSBr, which in turn reshapes the magnonic band structure in a dynamic and reversible manner. These results establish Fe-pz@CrSBr as a switchable platform for on-chip, programmable magnonic devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_17003 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Switchable Magnonic Crystals Based on Spin Crossover/CrSBr Heterostructures Shumilin, Andrei Dey, Sourav Coltuneac, Denisa Stoleriu, Laurentiu Baldoví, José J. Materials Science The progress of magnonics ultimately depends on material platforms that offer precise control of spin waves propagation. Here, we put forward a chemical strategy to create locally tunable magnonic crystals by integrating switchable spin-crossover (SCO) molecules with 2D van der Waals magnets. Specifically, we investigate from first principles a hybrid molecular/2D heterostructure formed by [Fe((3,5-(CH3)2Pz)3BH)2] molecules (Fe-pz) deposited on a single-layer of semiconducting CrSBr. We show that Fe-pz molecules are stable on CrSBr while preserving its SCO bistability, particularly in densely packed molecular arrays. By patterning Fe-pz into periodic stripes separated by pristine CrSBr regions, the interface becomes a magnonic crystal that filters spin waves at selected frequencies. Crucially, light-driven excited spin-state trapping (LIESST) enables LS-HS switching and induces up to ~1.3% local strain in CrSBr, which in turn reshapes the magnonic band structure in a dynamic and reversible manner. These results establish Fe-pz@CrSBr as a switchable platform for on-chip, programmable magnonic devices. |
| title | Switchable Magnonic Crystals Based on Spin Crossover/CrSBr Heterostructures |
| topic | Materials Science |
| url | https://arxiv.org/abs/2512.17003 |