Spin Elastodynamic Motive Force

Funato, Takumi; Matsuo, Mamoru

doi:10.1103/physrevlett.128.077201

Cited by 6 publications

(1 citation statement)

References 70 publications

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“…Furthermore, SVC is utilized in the angular momentum conversion between electron spin and vorticity of a surface acoustic wave (SAW) (i.e., an acoustic wave transmitted along the plane surface of a material). In this mechanism, local lattice rotation associated with a SAW drives spin currents via SVC [9,[12][13][14][15][16][17][18][19][20][21][22]. Along with research on conventional SAW-driven magnetization physics [23][24][25][26][27][28][29][30], these studies form a major field of SAW spintronics.…”

Section: Introductionmentioning

confidence: 99%

Spin hydrodynamic generation in unsteady flows

Funato¹,

Matsuo²

2022

Preprint

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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.

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