Frequency-independent optical spin injection in Weyl semimetals
We demonstrate that in Weyl semimetals, the momentum-space helical spin texture can couple to the chirality of the Weyl node to generate a frequency-independent optical spin injection. This frequency-independence is rooted in the topology of the Weyl node. Since the helicity and the chirality are al...
| Main Author: | |
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| Format: | Article |
| Language: | English |
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SciPost
2024-01-01
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| Series: | SciPost Physics Core |
| Online Access: | https://scipost.org/SciPostPhysCore.7.1.002 |
| _version_ | 1797348968643952640 |
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| author | Yang Gao, Chong Wang, Di Xiao |
| author_facet | Yang Gao, Chong Wang, Di Xiao |
| author_sort | Yang Gao, Chong Wang, Di Xiao |
| collection | DOAJ |
| description | We demonstrate that in Weyl semimetals, the momentum-space helical spin texture can couple to the chirality of the Weyl node to generate a frequency-independent optical spin injection. This frequency-independence is rooted in the topology of the Weyl node. Since the helicity and the chirality are always locked for Weyl nodes, the injected spin from a pair of Weyl nodes always add up, implying no symmetry requirements for Weyl semimetals. Finally, we show that such frequency-independent spin injection is robust against multiband corrections and lattice-regularization effect and capable of realizing all-optical magnetization switching in the THz regime. |
| first_indexed | 2024-03-08T12:13:52Z |
| format | Article |
| id | doaj.art-6bf58d604cc04d82be9fda33d282d033 |
| institution | Directory Open Access Journal |
| issn | 2666-9366 |
| language | English |
| last_indexed | 2024-03-08T12:13:52Z |
| publishDate | 2024-01-01 |
| publisher | SciPost |
| record_format | Article |
| series | SciPost Physics Core |
| spelling | doaj.art-6bf58d604cc04d82be9fda33d282d0332024-01-22T16:00:17ZengSciPostSciPost Physics Core2666-93662024-01-017100210.21468/SciPostPhysCore.7.1.002Frequency-independent optical spin injection in Weyl semimetalsYang Gao, Chong Wang, Di XiaoWe demonstrate that in Weyl semimetals, the momentum-space helical spin texture can couple to the chirality of the Weyl node to generate a frequency-independent optical spin injection. This frequency-independence is rooted in the topology of the Weyl node. Since the helicity and the chirality are always locked for Weyl nodes, the injected spin from a pair of Weyl nodes always add up, implying no symmetry requirements for Weyl semimetals. Finally, we show that such frequency-independent spin injection is robust against multiband corrections and lattice-regularization effect and capable of realizing all-optical magnetization switching in the THz regime.https://scipost.org/SciPostPhysCore.7.1.002 |
| spellingShingle | Yang Gao, Chong Wang, Di Xiao Frequency-independent optical spin injection in Weyl semimetals SciPost Physics Core |
| title | Frequency-independent optical spin injection in Weyl semimetals |
| title_full | Frequency-independent optical spin injection in Weyl semimetals |
| title_fullStr | Frequency-independent optical spin injection in Weyl semimetals |
| title_full_unstemmed | Frequency-independent optical spin injection in Weyl semimetals |
| title_short | Frequency-independent optical spin injection in Weyl semimetals |
| title_sort | frequency independent optical spin injection in weyl semimetals |
| url | https://scipost.org/SciPostPhysCore.7.1.002 |
| work_keys_str_mv | AT yanggaochongwangdixiao frequencyindependentopticalspininjectioninweylsemimetals |