′�?, which has a frequency of 295 cm−one, is attributed on the stretching vibration of Ga–Se bonds. The 2-phonon absorption with the 295 cm−one phonon corresponds into the crystal IR absorption edge, instead of the residual absorption peak. Density practical principle computations exhibit that the residual absorption with the BGSe https://chaunceyl655zmz9.wikiitemization.com/user