Optical Properties of Diluted Magnetic Semiconductors and their Superlattices

Using linear response theory, we have derived the form of a spin fluctuation-induced e-h interaction in a semi-magnetic semiconductor, in terms of spin susceptibilities. We then use neutron scattering[1] results on the type III antiferromagnetic behavior and magnetization results[2] on the spin glass behavior of this system to explain recent luminescence[3] measurements on (Cd,Mn)Te, which suggested the existence of spin fluctuation localization of electrons and holes.