Non-local magnon and phonon spin transport

One of the goals of spintronics is to achieve dissipationless spin currents. In this talk, I will discuss magnon and phonon spin transport through magnetic and non-magnetic insulators that is actuated and detected non-locally by electrical means. For magnetic insulators the spin current is, in the simplest case, carried by magnons and has a decay length on the order of several micrometers. For non-magnetic insulators, the spin current is carried by phonons leading to a decay length on the order of millimeters. More exotic forms of spin transport, such as spin superfluidity, are also mentioned.