Origin of the Phonon Hall Effect in Rare-Earth Garnets

Abstract

The phonon Hall effect has been observed in the paramagnetic insulator, Tb3Gd5O12. A magnetic field applied perpendicularly to a heat current induces a temperature gradient that is perpendicular to both the field and the current. We show that this effect is due to resonant skew scattering of phonons from the crystal field states of superstoichiometric Tb^3+ ions. This scattering originates from the coupling between the quadrupole moment of Tb^3+ ions and the lattice strain. The estimated magnitude of the effect is consistent with experimental observations at T=5 K, and can be significantly enhanced by increasing temperature.

5 pages, 3 figures

References in corpus (5)

• Observation of the Magnon Hall Effect
• Theoretical prediction of rotating magnon wavepacket in ferromagnets
• Topological Nature of the Phonon Hall Effect
• Anomalous Hall effect for the phonon heat conductivity in paramagnetic dielectric
• The phonon Hall effect: theory and application

Cited by in corpus (4)

• Emergence of nontrivial magnetic excitations in a spin liquid state of kagome volborthite
• Magnetic order and single-ion anisotropy in Tb${}_3$Ga${}_5$O${}_{12}$
• High-field thermal transport properties of the Kitaev quantum magnet alpha-RuCl3: evidence for low-energy excitations beyond the critical field
• Sizeable suppression of thermal Hall effect upon isotopic substitution in strontium titanate