Thermal conductivity of polar nitride perovskite LaWN3

ABX 3 -type nitride perovskites offer promising avenues for the future electronic industry, renowned for exceptional ferro- and piezo-electric properties with facile integration into prevalent nitride semiconductors. However, the paucity of in-depth investigations of thermal transport of nitride perovskites poses a substantial impediment to the practical implementation. Here, we experimentally investigate the thermal conductivity of orthorhombic polar LaWN 3 , synthesized by high-pressure high-temperature technique. The observed thermal conductivity exhibits drastic reduction with decreasing temperature, reminiscent of the behavior in amorphous silica. We postulate the anomalous glass-like thermal conductivity to a synergistic interplay of potential Ferron–phonon interactions, lattice disorders from octahedral distortions, and wave-like atomic tunneling. This study represents a pioneering exploration of thermal transport within nitride perovskites, paving the way for future advancements in nitride-based electronics.