Spin hydrodynamic generation in unsteady flows
Spin hydrodynamic generation in unsteady flows
复制标题
非定常流动中的自旋流体动力产生
DOI：
10.1016/j.jmmm.2023.170574
复制
发表时间：
2023
影响因子：
2.7
通讯作者：
Matsuo Mamoru
中科院分区：
文献类型：
--
作者：
Funato Takumi;Matsuo Mamoru
We theoretically investigate a spin-mediated conversion from fluid dynamics to voltage, known as spin hydrodynamic generation (SHDG), in oscillatory and transient unsteady flows. We consider unsteady flows of liquid metal between two parallel infinite planes and then calculate its vorticity fields based on the Navier–Stokes equation for an incompressible viscous fluid. The spin accumulation and spin current generated by unsteady flows are derived using a spin-diffusion equation, including spin-vorticity coupling, which is a couple of angular momentum between electron spin and vorticity field in unsteady flows. The estimation of SHDG in liquid mercury flow suggests that an observable magnitude of voltage can be induced in unsteady flows. Our results are expected to enable the realization of high-speed spin devices with unsteady flows and broaden the range of fluid spintronics applicability.
