Spin-phonon hybridization and its direct effect on thermal transport in the frustrated triangular magnet CsYbSe<sub>2</sub>.
ORAL
Abstract
The thermal conductivity of CsYbSe2, and in fact many other frustrated magnets, often exhibits strong, non-monotonic field-dependence, even when the state of magnetic lattice is disordered and a coherenet itinerant magnetic contribution is absent. We present a novel and highly-generic way in which phonon heat conduction can acquire unique nontrivial field-dependence through the hybridization of acoustic phonons and spin flip excitations via strain-modulation of the magnetic g-tensor. Analytical modelling of the hybridized spectra of this model under applied fields is successful in reproducing the qualitative features of transport data in CsYbSe2, and is potentially widely applicable to many other insulating magnetic systems.
*This work is supposed by the U.S. DOE, BES under Award DE-SC0021377 and a part of it was performed at the National High Magnetic Field Laboratory, which is supported by NSF Cooperative Agreement No. DMR-1644779 and the State of Florida.
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Publication: Manuscript in progress
Presenters
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Christopher A Pocs
- University of Colorado, Boulder