′�?, with a frequency of 295 cm−1, is attributed to the stretching vibration of Ga–Se bonds. The 2-phonon absorption of the 295 cm−one phonon corresponds to your crystal IR absorption edge, in lieu of the residual absorption peak. Density useful concept computations present that the residual absorption with the BGSe https://gunnerihdyr.ssnblog.com/31841832/the-best-side-of-baga4se7-crystal