′�?, having a frequency of 295 cm−one, is attributed to your stretching vibration of Ga–Se bonds. The 2-phonon absorption in the 295 cm−one phonon corresponds on the crystal IR absorption edge, rather then the residual absorption peak. Density useful principle computations demonstrate that the residual absorption of the BGSe crystal https://mahatmau009mzl4.wikikarts.com/user