′�?, having a frequency of 295 cm−one, is attributed into the stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−1 phonon corresponds into the crystal IR absorption edge, rather than the residual absorption peak. Density functional concept computations display which the residual absorption with the BGSe crystal https://baga4se7crystal39373.diowebhost.com/87482623/5-tips-about-baga4se7-crystal-you-can-use-today