Progress toward computing Phonon Thermal Transport in alpha-RuCl3

Thermal Hall effect in magnetic insulators has recently emerged as a prominent area of theoretical and experimental interest. The nature of heat carriers and the underlying mechanism, however, remain a subject of ongoing investigation. In the context of alpha-RuCl3, we have found that the observed thermal hall effect can be explained by the anomalous velocity acquired by phonons via spin-phonon scattering [1]. In this presentation I will address our recent progress in evaluating the phonon contribution to the thermal Hall conductivity taking into account the effects of full k-dependent spin-phonon coupling and the temperature-dependent phonon self-energies.