Interfacial Spin Conductance Behavior in Topologically Non-trivial Heterostructures

Spintronics is a paradigm that utilizes spin angular momentum as the fundamental logical bit for computing. Spin current is the means by which these bits can be altered to read and write digital information. Toward this end, topological magnon excitation offers a potentially alternative avenue to produce highly efficient topologically mediated spin currents in a device. Topological magnon excitations are hosted in 2D honeycomb topological magnon insulators (TMI) such as CrI3. We investigate the behavior of interfacial spin conductance at the boundary of TMIs, normal metals, and topologically trivial ferro- and anti-ferromagnets. The ensuing transport implications of the underlying topological heterostructure is discussed within the context of thermally driven spin conductivity.