′�?, using a frequency of 295 cm−one, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption in the 295 cm−1 phonon corresponds into the crystal IR absorption edge, as opposed to the residual absorption peak. Density functional theory computations demonstrate which the residual absorption on the BGSe https://baga4se7-crystal41839.59bloggers.com/32898462/the-smart-trick-of-baga4se7-crystal-that-no-one-is-discussing