Chiral-Damping-Enhanced Magnon Transmission
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866917645440253952 |
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| author | Ye, Xiyin Xia, Ke Bauer, Gerrit E. W. Yu, Tao |
| author_facet | Ye, Xiyin Xia, Ke Bauer, Gerrit E. W. Yu, Tao |
| contents | The inevitable Gilbert damping in magnetization dynamics is usually regarded as detrimental to spin transport. Here we apply a general feature of chiral non-Hermitian dynamics to a ferromagnetic-insulator--normal-metal heterostructure to show that the strong momentum dependence and chirality of the eddy-current-induced damping also causes beneficial scattering properties: A potential barrier that reflects magnon wave packets becomes unidirectionally transparent in the presence of a metallic cap layer. Passive magnon gates that turn presumably harmful dissipation into useful functionalities should be useful for future quantum magnonic devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_12022 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Chiral-Damping-Enhanced Magnon Transmission Ye, Xiyin Xia, Ke Bauer, Gerrit E. W. Yu, Tao Mesoscale and Nanoscale Physics The inevitable Gilbert damping in magnetization dynamics is usually regarded as detrimental to spin transport. Here we apply a general feature of chiral non-Hermitian dynamics to a ferromagnetic-insulator--normal-metal heterostructure to show that the strong momentum dependence and chirality of the eddy-current-induced damping also causes beneficial scattering properties: A potential barrier that reflects magnon wave packets becomes unidirectionally transparent in the presence of a metallic cap layer. Passive magnon gates that turn presumably harmful dissipation into useful functionalities should be useful for future quantum magnonic devices. |
| title | Chiral-Damping-Enhanced Magnon Transmission |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2401.12022 |