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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2306.01664 |
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| _version_ | 1866913247233310720 |
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| author | Wang, Xiaoming Xian, Yeming Yan, Yanfa |
| author_facet | Wang, Xiaoming Xian, Yeming Yan, Yanfa |
| contents | Chiral molecules can selectively transport electrons of a particular spin orientation, yet the underlying mechanism remain poorly understood. Here, we present theoretical evidence that electrons propagating through chiral materials with screw symmetry exhibit chirality themselves and carry symmetry-induced pseudo-angular momentum (PAM) which must be characterized by both spin and orbital components. The chiral electron transport is PAM polarized, with counterpropagating states exhibiting opposite PAM. At chiral-achiral interfaces, the PAM polarization is converted to spin polarization due to wave function matching, thereby establishing a novel principle for the chiral-induced spin selectivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2306_01664 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Chiral electrons and spin selectivity at chiral-achiral interfaces Wang, Xiaoming Xian, Yeming Yan, Yanfa Materials Science Chiral molecules can selectively transport electrons of a particular spin orientation, yet the underlying mechanism remain poorly understood. Here, we present theoretical evidence that electrons propagating through chiral materials with screw symmetry exhibit chirality themselves and carry symmetry-induced pseudo-angular momentum (PAM) which must be characterized by both spin and orbital components. The chiral electron transport is PAM polarized, with counterpropagating states exhibiting opposite PAM. At chiral-achiral interfaces, the PAM polarization is converted to spin polarization due to wave function matching, thereby establishing a novel principle for the chiral-induced spin selectivity. |
| title | Chiral electrons and spin selectivity at chiral-achiral interfaces |
| topic | Materials Science |
| url | https://arxiv.org/abs/2306.01664 |