′�?, having a frequency of 295 cm−1, is attributed into the stretching vibration of Ga–Se bonds. The two-phonon absorption of your 295 cm−one phonon corresponds to the crystal IR absorption edge, as opposed to the residual absorption peak. Density functional idea computations display which the residual absorption of the BGSe https://baga4se7crystal95173.loginblogin.com/39570932/baga4se7-crystal-an-overview