Manganese concentration effect on the lattice dynamics in multinary spin doped semiconductors

Statistical model of sphalerite structured quaternary A1−xBxYyZ1−y systems

“…In a quaternary these frequencies do shift, but these values indicate the range within which the four-ternary eight-spectrum bands should be confined, namely ≈ 139-200 cm −1 (see Refs. [38][39][40][41][42]). …”