Anisotropic manipulation of terahertz spin-waves by spin-orbit torque in a canted antiferromagnet
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866929599141642240 |
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| author | Kim, T. H. Kim, Jung-Il Kim, Geun-Ju Jang, Kwang-Ho Choi, G. -M. |
| author_facet | Kim, T. H. Kim, Jung-Il Kim, Geun-Ju Jang, Kwang-Ho Choi, G. -M. |
| contents | We theoretically and numerically elucidate the electrical control over spin waves in antiferromagnetic materials (AFM) with biaxial anisotropies and Dzyaloshinskii-Moriya interactions. The spin wave dispersion in an AFM manifests as a bifurcated spectrum with distinct high-frequency and low-frequency bands. Utilizing a heterostructure comprised of platinum and the AFM, we demonstrate anisotropic control of spin-wave bands via spin currents with three-dimensional spin polarizations, encompassing both resonant and propagating wave modes. Moreover, leveraging the confined geometry, we explore the possibility of controlling spin waves within a spectral domain ranging from tens of gigahertz to sub-terahertz frequencies. The implications of our findings suggest the potential for developing a terahertz wave source with electrical tunability, thereby facilitating its incorporation into ultrafast, broadband, and wireless communication technologies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_13309 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Anisotropic manipulation of terahertz spin-waves by spin-orbit torque in a canted antiferromagnet Kim, T. H. Kim, Jung-Il Kim, Geun-Ju Jang, Kwang-Ho Choi, G. -M. Applied Physics Materials Science We theoretically and numerically elucidate the electrical control over spin waves in antiferromagnetic materials (AFM) with biaxial anisotropies and Dzyaloshinskii-Moriya interactions. The spin wave dispersion in an AFM manifests as a bifurcated spectrum with distinct high-frequency and low-frequency bands. Utilizing a heterostructure comprised of platinum and the AFM, we demonstrate anisotropic control of spin-wave bands via spin currents with three-dimensional spin polarizations, encompassing both resonant and propagating wave modes. Moreover, leveraging the confined geometry, we explore the possibility of controlling spin waves within a spectral domain ranging from tens of gigahertz to sub-terahertz frequencies. The implications of our findings suggest the potential for developing a terahertz wave source with electrical tunability, thereby facilitating its incorporation into ultrafast, broadband, and wireless communication technologies. |
| title | Anisotropic manipulation of terahertz spin-waves by spin-orbit torque in a canted antiferromagnet |
| topic | Applied Physics Materials Science |
| url | https://arxiv.org/abs/2411.13309 |