′�?, with a frequency of 295 cm−1, is attributed to your stretching vibration of Ga–Se bonds. The two-phonon absorption of the 295 cm−one phonon corresponds on the crystal IR absorption edge, rather then the residual absorption peak. Density practical principle computations display the residual absorption from the BGSe crystal originates https://riverikhfc.rimmablog.com/32023280/how-much-you-need-to-expect-you-ll-pay-for-a-good-baga4se7-crystal