′�?, with a frequency of 295 cm−one, is attributed into the stretching vibration of Ga–Se bonds. The 2-phonon absorption with the 295 cm−1 phonon corresponds towards the crystal IR absorption edge, instead of the residual absorption peak. Density functional concept computations display which the residual absorption with the BGSe crystal https://margaretu999kym4.anchor-blog.com/12759054/5-tips-about-baga4se7-crystal-you-can-use-today