Colossal Magnon Magnetoresistance of Two-Dimensional Magnets
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arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866910539911790592 |
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| author | Webb, Caleb M Zhang, Shufeng |
| author_facet | Webb, Caleb M Zhang, Shufeng |
| contents | The magnon current holds substantial importance in facilitating the transfer of angular momentum in spin-based electronics. However, the magnon current in three-dimensional magnetic materials remains orders of magnitude too small for applications. In contrast, magnon numbers in two-dimensional systems exhibit significant enhancement and are markedly influenced by external magnetic fields. Here, we investigate the magnon current in a two-dimensional easy-axis ferromagnet and find a colossal magnon magnetoresistance (CMMR) effect, wherein the change of the magnon conductance can reach as high as a thousand percent in a moderate magnetic field. Moreover, the magnitude of the CMMR exhibits significant dependence on the orientation of the magnetic field due to the interplay between magnon- conserving and non-conserving scattering. We propose a non-local magnon-mediated electrical drag experiment for the possible experimental observation of the predicted effect. With the CMMR effect and a much larger magnon number, magnon current in 2D materials shows promise as a primary source for spin transport in spintronics devices.9 |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_16858 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Colossal Magnon Magnetoresistance of Two-Dimensional Magnets Webb, Caleb M Zhang, Shufeng Mesoscale and Nanoscale Physics Materials Science The magnon current holds substantial importance in facilitating the transfer of angular momentum in spin-based electronics. However, the magnon current in three-dimensional magnetic materials remains orders of magnitude too small for applications. In contrast, magnon numbers in two-dimensional systems exhibit significant enhancement and are markedly influenced by external magnetic fields. Here, we investigate the magnon current in a two-dimensional easy-axis ferromagnet and find a colossal magnon magnetoresistance (CMMR) effect, wherein the change of the magnon conductance can reach as high as a thousand percent in a moderate magnetic field. Moreover, the magnitude of the CMMR exhibits significant dependence on the orientation of the magnetic field due to the interplay between magnon- conserving and non-conserving scattering. We propose a non-local magnon-mediated electrical drag experiment for the possible experimental observation of the predicted effect. With the CMMR effect and a much larger magnon number, magnon current in 2D materials shows promise as a primary source for spin transport in spintronics devices.9 |
| title | Colossal Magnon Magnetoresistance of Two-Dimensional Magnets |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2407.16858 |