Anisotropic Klemens model for the thermal conductivity tensor
Applied Physics
2023-07-18 v1
Abstract
With the constraint from Onsager reciprocity relations, here we generalize the Klemens model for phonon-phonon Umklapp scattering from isotropic to anisotropic. Combined with the anisotropic Debye dispersion, this anisotropic Klemens model leads to analytical expressions for heat transfer along both ab-plane (k_ab) and c-axis (k_c), suitable for both layered and chainlike materials with any anisotropy ratio of the dispersion and the scattering. The model is justified by comparison with experimental k_ab and k_c of bulk graphite at high temperatures, as well as the thickness-dependent k_c of graphite thin films at room temperature.
Keywords
Cite
@article{arxiv.2307.07808,
title = {Anisotropic Klemens model for the thermal conductivity tensor},
author = {Bo Jiang and Tao Li and Zhen Chen},
journal= {arXiv preprint arXiv:2307.07808},
year = {2023}
}