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Spin-velocity locking in a helical chain of atomic p (+/-) orbitals
| Title: | Spin-velocity locking in a helical chain of atomic p (+/-) orbitals |
| Authors: | Kashiwa, Shinnosuke Browse this author | | Akera, Hiroshi Browse this author →KAKEN DB |
| Issue Date: | 3-Jul-2023 |
| Publisher: | AIP Publishing |
| Journal Title: | Journal of chemical physics |
| Volume: | 158 |
| Issue: | 21 |
| Start Page: | 214705 |
| Publisher DOI: | 10.1063/5.0152103 |
| Abstract: | Observations of a high spin selectivity in various helical structures, which is called the chirality-induced spin selectivity, suggest a common mechanism originating from the helical geometry. In this paper, we consider a helical chain of atomic p (+/-) orbitals having the tangential angular momentum iota = +/- 1. We show in this model that the coupling of l and the spin gives rise to spin-velocity locking, i.e., directions of spin and group velocity are parallel or antiparallel depending on the chirality of the helix, and consequently, an almost perfect spin selectivity in a specific energy region in a wide range of the curvature and the torsion of the helix. We find that the present spin-velocity locking originates from the helical symmetry in which the Hamiltonian is invariant with respect to a combined operation of the rotation around the helix axis and the translation along the helix axis. Therefore, we expect that spin-velocity locking occurs in a wide variety of helical structures. |
| Rights: | This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Shinnosuke Kashiwa, Hiroshi Akera; Spin-velocity locking in a helical chain of atomic p± orbitals. J. Chem. Phys. 7 June 2023; 158 (21): 214705 and may be found at https://doi.org/10.1063/5.0152103. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/92697 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 明楽 浩史
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