Extrinsic Mechanisms of Phonon Magnetic Moment
Fuente:
arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
| Accesso online: | |
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| _version_ | 1866910178042970112 |
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| author | Xue, Rui Qiao, Zhenhua Gao, Yang Niu, Qian |
| author_facet | Xue, Rui Qiao, Zhenhua Gao, Yang Niu, Qian |
| contents | We develop a general formalism of phonon magnetic moment by including the relaxation process. We then identify the skew-scattering and side-jump contributions to the phonon magnetic moment originating from the non-adiabaticity, both of which are related to the nonlocal phonon Berry curvature and are in close analogy to those in the electronic Hall effect. All contributions of the phonon magnetic moment are exemplified in a honeycomb lattice, showing that the extrinsic contribution can be as important as the intrinsic one and that the resulting phonon angular momentum varies significantly across the Brillouin zone. Our work offers a systematic framework of the phonon chirality and paves the way of tuning the phonon magnetic moment through the non-adiabaticity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_03204 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Extrinsic Mechanisms of Phonon Magnetic Moment Xue, Rui Qiao, Zhenhua Gao, Yang Niu, Qian Mesoscale and Nanoscale Physics We develop a general formalism of phonon magnetic moment by including the relaxation process. We then identify the skew-scattering and side-jump contributions to the phonon magnetic moment originating from the non-adiabaticity, both of which are related to the nonlocal phonon Berry curvature and are in close analogy to those in the electronic Hall effect. All contributions of the phonon magnetic moment are exemplified in a honeycomb lattice, showing that the extrinsic contribution can be as important as the intrinsic one and that the resulting phonon angular momentum varies significantly across the Brillouin zone. Our work offers a systematic framework of the phonon chirality and paves the way of tuning the phonon magnetic moment through the non-adiabaticity. |
| title | Extrinsic Mechanisms of Phonon Magnetic Moment |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2501.03204 |