Microfluidic Actuation by Einstein-de Haas Spin Torque
Fuente:
arXiv
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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866917530588676096 |
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| author | Hu, Xin Matsuo, Mamoru |
| author_facet | Hu, Xin Matsuo, Mamoru |
| contents | We propose spin-current microfluidic actuation of a sealed liquid metal. Spin angular momentum injected from Pt contacts enters the liquid as an Einstein-de Haas torque and is converted through micropolar angular-momentum balance into viscous flow without pressure drive, moving walls, magnetic fields, Lorentz forces, or charge flow through the liquid. The dc velocity obeys universal spin-diffusion scaling, and the finite-frequency spin-mechanical admittance resolves viscous momentum diffusion, spin transport, microrotation relaxation, and interface transparency of the liquid-metal channel. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_25387 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Microfluidic Actuation by Einstein-de Haas Spin Torque Hu, Xin Matsuo, Mamoru Mesoscale and Nanoscale Physics Fluid Dynamics We propose spin-current microfluidic actuation of a sealed liquid metal. Spin angular momentum injected from Pt contacts enters the liquid as an Einstein-de Haas torque and is converted through micropolar angular-momentum balance into viscous flow without pressure drive, moving walls, magnetic fields, Lorentz forces, or charge flow through the liquid. The dc velocity obeys universal spin-diffusion scaling, and the finite-frequency spin-mechanical admittance resolves viscous momentum diffusion, spin transport, microrotation relaxation, and interface transparency of the liquid-metal channel. |
| title | Microfluidic Actuation by Einstein-de Haas Spin Torque |
| topic | Mesoscale and Nanoscale Physics Fluid Dynamics |
| url | https://arxiv.org/abs/2605.25387 |