Magnetic Moment vs Angular Momentum: Spin Hall Response in Bismuth
Fuente:
arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866914232182767616 |
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| author | Fujimoto, Junji Izaki, Yuki Fuseya, Yuki |
| author_facet | Fujimoto, Junji Izaki, Yuki Fuseya, Yuki |
| contents | Spin currents can carry either spin angular momentum or its associated magnetic moment, which are no longer strictly proportional in multiband systems. Using a multiband $k \cdot p$ model, we compute the intrinsic spin Hall conductivity tensors of elemental Bi. The magnetic-moment tensor emerges about two orders of magnitude larger and far less anisotropic than the angular-momentum tensor, while quasiparticle damping activates otherwise longitudinal components. The magnetic-moment spin Hall angle exceeds unity, demonstrating that a clear distinction between the two currents is indispensable for multiband systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_07200 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magnetic Moment vs Angular Momentum: Spin Hall Response in Bismuth Fujimoto, Junji Izaki, Yuki Fuseya, Yuki Mesoscale and Nanoscale Physics Materials Science Spin currents can carry either spin angular momentum or its associated magnetic moment, which are no longer strictly proportional in multiband systems. Using a multiband $k \cdot p$ model, we compute the intrinsic spin Hall conductivity tensors of elemental Bi. The magnetic-moment tensor emerges about two orders of magnitude larger and far less anisotropic than the angular-momentum tensor, while quasiparticle damping activates otherwise longitudinal components. The magnetic-moment spin Hall angle exceeds unity, demonstrating that a clear distinction between the two currents is indispensable for multiband systems. |
| title | Magnetic Moment vs Angular Momentum: Spin Hall Response in Bismuth |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2508.07200 |