Terahertz Magnon Excitations and Switching in Non-Collinear Antiferromagnets
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866929654857728000 |
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| author | Goli, Durga Prasad Kim, Se Kwon |
| author_facet | Goli, Durga Prasad Kim, Se Kwon |
| contents | We investigate how spatiotemporal spin polarized current can lead to terahertz frequency excitations in non-collinear antiferromagnets. By solving the Landau-Lifshitz-Gilbert equation numerically for non-collinear antiferromagnet, we show that the magnon frequency spectrum exhibits standing spin wave modes and depends on the thickness of Mn$_3$Ge in heterostructure Fe|Au|Mn$_3$Ge. Also, we analyze the switching process of ground state as a function of a spin current. We show a switching phase diagram, which contains switching and non-switching regions. Our work suggests non-collinear antiferromagnets as an efficient platform for terahertz magnonics and ultrafast memory devices. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2501_01150 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Terahertz Magnon Excitations and Switching in Non-Collinear Antiferromagnets Goli, Durga Prasad Kim, Se Kwon Mesoscale and Nanoscale Physics We investigate how spatiotemporal spin polarized current can lead to terahertz frequency excitations in non-collinear antiferromagnets. By solving the Landau-Lifshitz-Gilbert equation numerically for non-collinear antiferromagnet, we show that the magnon frequency spectrum exhibits standing spin wave modes and depends on the thickness of Mn$_3$Ge in heterostructure Fe|Au|Mn$_3$Ge. Also, we analyze the switching process of ground state as a function of a spin current. We show a switching phase diagram, which contains switching and non-switching regions. Our work suggests non-collinear antiferromagnets as an efficient platform for terahertz magnonics and ultrafast memory devices. |
| title | Terahertz Magnon Excitations and Switching in Non-Collinear Antiferromagnets |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2501.01150 |