′�?, which has a frequency of 295 cm−one, is attributed to your stretching vibration of Ga–Se bonds. The 2-phonon absorption with the 295 cm−1 phonon corresponds for the crystal IR absorption edge, as opposed to the residual absorption peak. Density functional idea computations exhibit the residual absorption in the BGSe https://baga4se7-crystal13567.blogrelation.com/38820084/the-smart-trick-of-baga4se7-crystal-that-nobody-is-discussing