Orbital diffusion, polarization and swapping in centrosymmetric metals
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arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866909363534299136 |
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| author | Ning, Xiaobai Pezo, A. Kim, Kyoung-Whan Zhao, Weisheng Lee, Kyung-Jin Manchon, Aurelien |
| author_facet | Ning, Xiaobai Pezo, A. Kim, Kyoung-Whan Zhao, Weisheng Lee, Kyung-Jin Manchon, Aurelien |
| contents | We propose a general theory of charge, spin, and orbital diffusion based on Keldysh formalism. Our findings indicate that the diffusivity of orbital angular momentum in metals is much lower than that of spin or charge due to the strong orbital intermixing in crystals. Furthermore, our theory introduces the concept of spin-orbit polarization by which a pure orbital (spin) current induces a longitudinal spin (orbital) current, a process as efficient as spin polarization in ferromagnets. Finally, we find that orbital currents undergo momentum swapping, even in the absence of spin-orbit coupling. This theory establishes several key parameters for orbital transport of direct importance to experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_04763 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Orbital diffusion, polarization and swapping in centrosymmetric metals Ning, Xiaobai Pezo, A. Kim, Kyoung-Whan Zhao, Weisheng Lee, Kyung-Jin Manchon, Aurelien Mesoscale and Nanoscale Physics We propose a general theory of charge, spin, and orbital diffusion based on Keldysh formalism. Our findings indicate that the diffusivity of orbital angular momentum in metals is much lower than that of spin or charge due to the strong orbital intermixing in crystals. Furthermore, our theory introduces the concept of spin-orbit polarization by which a pure orbital (spin) current induces a longitudinal spin (orbital) current, a process as efficient as spin polarization in ferromagnets. Finally, we find that orbital currents undergo momentum swapping, even in the absence of spin-orbit coupling. This theory establishes several key parameters for orbital transport of direct importance to experiments. |
| title | Orbital diffusion, polarization and swapping in centrosymmetric metals |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2310.04763 |