论文标题
在不稳定流中自旋流体动力产生
Spin hydrodynamic generation in unsteady flows
论文作者
论文摘要
从理论上讲，我们在振荡和短暂的不稳定流中研究了从流体动力学到电压的自旋介导的转化率，称为自旋流体动力产生（SHDG）。我们考虑两个平行的无限平面之间的液态金属的不稳定流量，然后根据Navier计算其涡度场 - 用于不可压缩的粘性液体的Stokes方程。不稳定流的自旋积聚和自旋电流是使用自旋扩散方程得出的，包括自旋涡度耦合，这是不稳定流中电子自旋和涡流场之间的几个角动量。液态汞流量中SHDG的估计表明，可观察到的电压可在不稳定的流中诱导。我们的结果有望实现具有不稳定流量的高速自旋设备，并扩大了流体旋转的适用性范围。
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.
