Antiparallel spin polarizations as quadratic response in chiral systems
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866917294030979072 |
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| author | Inda, Akane Hattori, Kohei Kusunose, Hiroaki Hayami, Satoru |
| author_facet | Inda, Akane Hattori, Kohei Kusunose, Hiroaki Hayami, Satoru |
| contents | Chirality-dependent spin generation has attracted considerable attention in condensed matter physics. In this paper, we theoretically investigate antiparallel spin polarization as a chirality-dependent quadratic response, by using a finite chiral system composed of triangular prisms. Based on the nonlinear Kubo formalism and real-time simulations, we demonstrate that spatially inhomogeneous antiparallel spin polarizations are induced as a dissipative quadratic DC response to a homogeneous AC electric field. In particular, we elucidate role of microscopic parameters characterizing the handedness of chirality, and naive expectation of spin polarization as a consequence of spin accumulation of spin current. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_21718 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Antiparallel spin polarizations as quadratic response in chiral systems Inda, Akane Hattori, Kohei Kusunose, Hiroaki Hayami, Satoru Mesoscale and Nanoscale Physics Chirality-dependent spin generation has attracted considerable attention in condensed matter physics. In this paper, we theoretically investigate antiparallel spin polarization as a chirality-dependent quadratic response, by using a finite chiral system composed of triangular prisms. Based on the nonlinear Kubo formalism and real-time simulations, we demonstrate that spatially inhomogeneous antiparallel spin polarizations are induced as a dissipative quadratic DC response to a homogeneous AC electric field. In particular, we elucidate role of microscopic parameters characterizing the handedness of chirality, and naive expectation of spin polarization as a consequence of spin accumulation of spin current. |
| title | Antiparallel spin polarizations as quadratic response in chiral systems |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2602.21718 |