HOW MUCH YOU NEED TO EXPECT YOU'LL PAY FOR A GOOD BAGA4SE7 CRYSTAL

′�?, with a frequency of 295 cm−1, is attributed for the stretching vibration of Ga–Se bonds. The two-phonon absorption from the 295 cm−1 phonon corresponds into the crystal IR absorption edge, instead of the residual absorption peak. Density functional idea computations present that the residual absorption of the BGSe crystal originates