Abstract
The phonon Hall effect has been observed in the paramagnetic insulator . 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 ions. This scattering originates from the coupling between the quadrupole moment of ions and the lattice strain. The estimated magnitude of the effect is consistent with experimental observations at and can be significantly enhanced by increasing temperature.
- Received 3 July 2014
DOI:https://doi.org/10.1103/PhysRevLett.113.265901
© 2014 American Physical Society