Phonon Thermal Hall Effect in a non-Kramers Paramagnet

Abstract

With an increasing number of experiments observing phonon thermal Hall effect in magnets, it is theoretically desired to have a minimal model for the phonon thermal Hall effect. In this work, we study a simple model of acoustic phonons and uncorrelated paramagnetic doublets. When the doublets are non-Kramers, a linear pseudospin-phonon coupling is allowed by time-reversal symmetry and yields resonant phonon-pseudospin scattering. We compute the thermal longitudinal and Hall conductivities of the model and found qualitative agreement with recent experiments in ${\mathrm{Pr}}_2{\mathrm{Ir}}_2{\mathrm{O}}_7$ [Uehara et al.,Nat Commun 13, 4604 (2022)].

arXiv comment22 pages, 5 figures

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Cited by in corpus (4)

• Thermal Hall effects in quantum magnets
• Phonon thermal Hall effect in non-magnetic Y${}_2$Ti${}_2$O${}_7$
• Upper branch thermal Hall effect in quantum paramagnets
• Field-Angle Dependence of Phonon Thermal Hall Effect in Na2X2TeO6 (X = Co, Zn)