Acoustic spin transport in s-wave superconductors

We theoretically study the generation of spin current due to a surface acoustic wave in an s-wave superconductor. We model an s-wave superconductor as the mean-field Hamiltonian and calculate spin current generated via spin-vorticity coupling based on quantum kinetic theory. The results suggest that the spin current can be driven in a single-superconductor layer. Our proposal may contribute to the advancement of spin transport in superconductors from application and fundamental physics aspects.