Long-Range Phonon Spin Transport

Rembert Duine, Utrecht University

One of the goals of spintronics is to achieve dissipationless spin currents. In this talk, I will discuss phonon spin transport in an insulating ferromagnet-nonmagnet-ferromagnet heterostructure. I will discuss how the magnetoelastic interaction between the spins and the phonons leads to nonlocal spin transfer between the magnets. This transfer is mediated by a local phonon spin current and accompanied by a phonon spin accumulation. The spin conductance depends nontrivially on the system size, and decays over millimeter length scales for realistic material parameters, far exceeding the decay lengths of magnonic spin currents.

PDF file of the talk available here