′�?, with a frequency of 295 cm−1, is attributed towards the stretching vibration of Ga–Se bonds. The two-phonon absorption of your 295 cm−1 phonon corresponds towards the crystal IR absorption edge, rather than the residual absorption peak. Density purposeful concept computations show which the residual absorption of the BGSe crystal https://emilianocggfc.designertoblog.com/64046520/not-known-facts-about-baga4se7-crystal