′�?, that has a frequency of 295 cm−one, is attributed to your stretching vibration of Ga–Se bonds. The two-phonon absorption in the 295 cm−1 phonon corresponds to the crystal IR absorption edge, rather then the residual absorption peak. Density useful theory computations demonstrate that the residual absorption of the BGSe https://keegangwjuf.worldblogged.com/38817608/rumored-buzz-on-baga4se7-crystal