′�?, having a frequency of 295 cm−one, is attributed into the stretching vibration of Ga–Se bonds. The 2-phonon absorption in the 295 cm−1 phonon corresponds towards the crystal IR absorption edge, as opposed to the residual absorption peak. Density functional principle computations demonstrate that the residual absorption of your BGSe https://reidk544v.like-blogs.com/32471017/not-known-details-about-baga4se7-crystal