Large extrinsic phonon thermal Hall effect from resonant scattering

Abstract

Recent experimental observations of unexpectedly large thermal Hall conductivities, ${\kappa }_H$, in insulating materials, including the parent compounds of the high temperature superconducting cuprates, likely reflect an extrinsic contribution from a yet to be identified extrinsic source of skew scattering of acoustic phonons. We show that resonant scattering of phonons from a certain class of three-level systems produces strong skew scattering in the presence of a modest magnetic field. We interpret this as a first step towards understanding the experiments.

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References in corpus (5)

• Giant thermal Hall conductivity from neutral excitations in the pseudogap phase of cuprates
• Origin of the Phonon Hall Effect in Rare-Earth Garnets
• Large Phonon Thermal Hall Conductivity in a Simple Antiferromagnetic Insulator
• Charged Defects and Phonon Hall Effects in Ionic Crystals
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