Metallic theta-phase tantalum nitride conducts heat nearly 3X more efficiently than copper or silver, reaching approximately 1,100 W/mK

https://www.eurekalert.org/news-releases/1113320

"metals' heat flow restricted by strong interactions between electrons/ phonons... overcome with material’s hexagonal pattern of tantalum atoms interspersed with nitrogen, exhibiting extremely weak electron-phonon interactions... AI accelerators, high-performance chips, removing localized hotspots in high-density processors, improving energy efficiency in massive data centers, enhancing reliability in aerospace systems and quantum computing platforms"