′�?, having a frequency of 295 cm−1, is attributed towards the stretching vibration of Ga–Se bonds. The two-phonon absorption of the 295 cm−one phonon corresponds on the crystal IR absorption edge, in lieu of the residual absorption peak. Density functional theory computations show which the residual absorption in the BGSe https://baga4se7-crystal40625.theblogfairy.com/32044811/the-best-side-of-baga4se7-crystal