′�?, having a frequency of 295 cm−1, is attributed towards the stretching vibration of Ga–Se bonds. The 2-phonon absorption on the 295 cm−one phonon corresponds on the crystal IR absorption edge, rather then the residual absorption peak. Density purposeful principle computations exhibit which the residual absorption of the BGSe crystal https://baga4se7-crystal53062.life3dblog.com/31835908/details-fiction-and-baga4se7-crystal