Chirality-dependent spin polarization in metals: linear and quadratic responses
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866913005900398592 |
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| author | Yoshimi, Kosuke Kato, Yusuke Suzuki, Yuta Sumita, Shuntaro Sato, Takuro Yamamoto, Hiroshi M. Togawa, Yoshihiko Kusunose, Hiroaki Kishine, Jun-ichiro |
| author_facet | Yoshimi, Kosuke Kato, Yusuke Suzuki, Yuta Sumita, Shuntaro Sato, Takuro Yamamoto, Hiroshi M. Togawa, Yoshihiko Kusunose, Hiroaki Kishine, Jun-ichiro |
| contents | We study spin polarization induced by locally injected electric currents in a metal whose spin--orbit coupling reflects its structural chirality. We reveal both spin polarization in the bulk in the linear response and antiparallel spin polarization near the interface in the quadratic response to external electric currents, and reproduce the experimentally observed correlation between the chirality of the metal and the direction of spin polarization. In particular, we elucidate that the sign of the spin polarization in the quadratic response is opposite to that expected from the bulk spin current. This sign discrepancy originates from spin polarization induced by dipole-like charge distribution appearing in the quadratic response. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_04450 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Chirality-dependent spin polarization in metals: linear and quadratic responses Yoshimi, Kosuke Kato, Yusuke Suzuki, Yuta Sumita, Shuntaro Sato, Takuro Yamamoto, Hiroshi M. Togawa, Yoshihiko Kusunose, Hiroaki Kishine, Jun-ichiro Mesoscale and Nanoscale Physics Materials Science We study spin polarization induced by locally injected electric currents in a metal whose spin--orbit coupling reflects its structural chirality. We reveal both spin polarization in the bulk in the linear response and antiparallel spin polarization near the interface in the quadratic response to external electric currents, and reproduce the experimentally observed correlation between the chirality of the metal and the direction of spin polarization. In particular, we elucidate that the sign of the spin polarization in the quadratic response is opposite to that expected from the bulk spin current. This sign discrepancy originates from spin polarization induced by dipole-like charge distribution appearing in the quadratic response. |
| title | Chirality-dependent spin polarization in metals: linear and quadratic responses |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2408.04450 |