′�?, having a frequency of 295 cm−1, is attributed on the stretching vibration of Ga–Se bonds. The two-phonon absorption of the 295 cm−one phonon corresponds towards the crystal IR absorption edge, as opposed to the residual absorption peak. Density functional principle computations present which the residual absorption in the BGSe https://heraclitusf544ymb0.fliplife-wiki.com/user