First Principles Insights into the Thermal Hall Effect in Magnetic Insulators

We have recently developed first-principles based approach for treating generic spin-phonon interactions in materials with strong spin-orbit coupling (SOC). This allows for estimation of various terms relevant to the phonon thermal Hall effect, acoustic Faraday effect, ultrasound attenuation, and magnon-phonon hybridization. This talk will outline insights obtained by this method into the phonon thermal Hall effect in magnetic insulators, identifying which materials it is likely to be prominent, and the anticipated phenomenology.