2023/11/06 by Amey G. Gokhale, Ankit Jain, Gokhale, Amey G. +1 · 1 citation
Materials Science · #Advanced Thermoelectric Materials and Devices #FOS: Physical sciences #Machine Learning in Materials Science #Materials Science (cond-mat.mtrl-sci) #Thermal properties of materials
paper · pdf · doi:10.48550/arxiv.2311.03144
openalex publication_date 2023/11/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The cross-plane (across-layers) phonon thermal transport of five diverse, layered semiconductors is investigated by accounting for higher-order four-phonon scattering, phonon renormalization, and multi-channel thermal transport. For materials having relatively large cross-plane thermal conductivity (AlB6, MoS2, and MoSi2N4), phonons contributing to cross-plane conductivity have an order of magnitude larger mean free path than that for the basal-plane thermal transport, whereas the opposite effect is observed for materials with low thermal conductivity (MoO3 and KCuSe). The contribution from the wave-like coherent transport channel is less than 5% in all considered materials. Our work unravels the contrasting role of nano-structuring on the basal- vs. cross-plane thermal conductivity of low and high thermal conductivity layered materials.