Controllable nonreciprocal spin Seebeck effect in helimagnets
Nonreciprocal transport plays a crucial role in various fundamental challenges and applications in the fields of physics and technology. Here, we investigate the thermal spin transport property of helimagnets using the Non-equilibrium Green’s Function method. Our results reveal that the spin current...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/add368 |
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| author | Xiao-Feng Chen Pei-Jia Hu Ai-Min Guo Tie-Feng Fang Chenglong Jia |
| author_facet | Xiao-Feng Chen Pei-Jia Hu Ai-Min Guo Tie-Feng Fang Chenglong Jia |
| author_sort | Xiao-Feng Chen |
| collection | DOAJ |
| description | Nonreciprocal transport plays a crucial role in various fundamental challenges and applications in the fields of physics and technology. Here, we investigate the thermal spin transport property of helimagnets using the Non-equilibrium Green’s Function method. Our results reveal that the spin currents driven by a temperature difference remain reciprocal in the absence of an external magnetic field and magnetic anisotropy. However, a nonreciprocal spin Seebeck effect arises when an external magnetic field or magnetic anisotropy is introduced in the system. Notably, the nonreciprocal effect can be amplified with increasing strength of the magnetic field or magnetic anisotropy. Furthermore, we demonstrate that this effect persists even in the presence of Gilbert damping. A detailed analysis highlights how the breaking of mirror symmetry contributes to asymmetries in magnon spin transmission, ultimately leading to nonreciprocal behavior. |
| format | Article |
| id | doaj-art-f0c2bb91b0d4475d9ba3bbdcfc2310a1 |
| institution | OA Journals |
| issn | 1367-2630 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj-art-f0c2bb91b0d4475d9ba3bbdcfc2310a12025-08-20T02:29:16ZengIOP PublishingNew Journal of Physics1367-26302025-01-0127505350410.1088/1367-2630/add368Controllable nonreciprocal spin Seebeck effect in helimagnetsXiao-Feng Chen0Pei-Jia Hu1Ai-Min Guo2Tie-Feng Fang3Chenglong Jia4https://orcid.org/0000-0003-2064-923XSchool of Physical Science and Technology, Lanzhou University , Lanzhou 730000, People’s Republic of China; Lanzhou Center for Theoretical Physics, Key Laboratory of Theoretical Physics of Gansu Province, Gansu Provincial Research Center for Basic Disciplines of Quantum Physics, Lanzhou University , Lanzhou 730000, People’s Republic of China; Hunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics, Central South University , Changsha 410083, People’s Republic of ChinaHunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics, Central South University , Changsha 410083, People’s Republic of ChinaHunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics, Central South University , Changsha 410083, People’s Republic of ChinaSchool of Physical Science and Technology, Nantong University , Nantong 226019, People’s Republic of ChinaSchool of Physical Science and Technology, Lanzhou University , Lanzhou 730000, People’s Republic of China; Lanzhou Center for Theoretical Physics, Key Laboratory of Theoretical Physics of Gansu Province, Gansu Provincial Research Center for Basic Disciplines of Quantum Physics, Lanzhou University , Lanzhou 730000, People’s Republic of ChinaNonreciprocal transport plays a crucial role in various fundamental challenges and applications in the fields of physics and technology. Here, we investigate the thermal spin transport property of helimagnets using the Non-equilibrium Green’s Function method. Our results reveal that the spin currents driven by a temperature difference remain reciprocal in the absence of an external magnetic field and magnetic anisotropy. However, a nonreciprocal spin Seebeck effect arises when an external magnetic field or magnetic anisotropy is introduced in the system. Notably, the nonreciprocal effect can be amplified with increasing strength of the magnetic field or magnetic anisotropy. Furthermore, we demonstrate that this effect persists even in the presence of Gilbert damping. A detailed analysis highlights how the breaking of mirror symmetry contributes to asymmetries in magnon spin transmission, ultimately leading to nonreciprocal behavior.https://doi.org/10.1088/1367-2630/add368helimagnetsspin Seebeck effectnonreciprocal effect |
| spellingShingle | Xiao-Feng Chen Pei-Jia Hu Ai-Min Guo Tie-Feng Fang Chenglong Jia Controllable nonreciprocal spin Seebeck effect in helimagnets New Journal of Physics helimagnets spin Seebeck effect nonreciprocal effect |
| title | Controllable nonreciprocal spin Seebeck effect in helimagnets |
| title_full | Controllable nonreciprocal spin Seebeck effect in helimagnets |
| title_fullStr | Controllable nonreciprocal spin Seebeck effect in helimagnets |
| title_full_unstemmed | Controllable nonreciprocal spin Seebeck effect in helimagnets |
| title_short | Controllable nonreciprocal spin Seebeck effect in helimagnets |
| title_sort | controllable nonreciprocal spin seebeck effect in helimagnets |
| topic | helimagnets spin Seebeck effect nonreciprocal effect |
| url | https://doi.org/10.1088/1367-2630/add368 |
| work_keys_str_mv | AT xiaofengchen controllablenonreciprocalspinseebeckeffectinhelimagnets AT peijiahu controllablenonreciprocalspinseebeckeffectinhelimagnets AT aiminguo controllablenonreciprocalspinseebeckeffectinhelimagnets AT tiefengfang controllablenonreciprocalspinseebeckeffectinhelimagnets AT chenglongjia controllablenonreciprocalspinseebeckeffectinhelimagnets |