Suppression of Thermal Conductivity via Singlet-Dominated Scattering in TmFeO${}_3$

M. L. McLanahan, D. Lederman, A. P. Ramirez

We measured the thermal conductivity of the rare-earth orthoferrites, $R$FeO${}_3$, where $R$ = Eu, Gd, Tb, Dy, Ho, Er, Tm, and Yb from 3 K to 300 K and see an anomalous strong suppr…