We report measurements of the thermal conductivity κ on single crystalline CeRu4Sn6 in the temperature range between 80mK and 80K, along the main crystallographic directions. κ is phonon-dominated in the whole temperature range and is found to be essentially isotropic. At low temperatures the data are well approximated by κ∝T2, which is attributed to a predominant scattering of phonons on electrons. We describe the data with a Callaway fit in the whole temperature range giving good agreement at low and high temperatures.
@article{arxiv.1908.00803,
title = {Thermal conductivity of the Kondo semiconductor CeRu$_4$Sn$_6$},
author = {J Hänel and M Taupin and M Ikeda and V Martelli and P Tomeš and A Prokofiev and S Paschen},
journal= {arXiv preprint arXiv:1908.00803},
year = {2019}
}