Thermal Conductivity of BAs under Pressure

The thermal conductivity of boron arsenide (BAs) is believed to be influenced by phonon scattering selection rules due its special dispersion. Compression BAs leads significant changes in dispersion, which allows for a test first principles theories how dispersion affects three- and four-phonon rates. This study reports the from 0 30 GPa. Thermal vs. pressure measured time-domain thermoreflectance with diamond anvil cell. In stark contrast what typical nonmetallic crystals, observed have independent below crystals typically increases upon compression. unusual independence shows important relationship between properties