′�?, which has a frequency of 295 cm−one, is attributed towards the stretching vibration of Ga–Se bonds. The two-phonon absorption on the 295 cm−1 phonon corresponds to your crystal IR absorption edge, instead of the residual absorption peak. Density functional concept computations exhibit which the residual absorption of your BGSe https://holdenfwkwh.oblogation.com/32085339/how-much-you-need-to-expect-you-ll-pay-for-a-good-baga4se7-crystal