Researchers report high carrier mobility of cubic boron arsenide

https://phys.org/news/2022-07-high-carrier-mobility-cubic-boron.html

"The probe beam was broadened to a wide illumination field; thus, the carriers' spatiotemporal dynamics could be visualized directly. By adjusting the energy of the excitation laser below or above the bandgap, intrinsic carriers and hot carriers could be excited, respectively. Intrinsic carrier mobility of about 1550 cm2V-1s-1 was measured and matched theoretical predictions well"

See also: Cubic Boron Arsenide - A Perfect Semiconductor?

https://compoundsemiconductor.net/article/115140/Cubic_Boron_Arsenide_-_A_Perfect