Optical spectra of CdMnSe of nano-ferro- and antiferro-magnets

Abstract

We study optical transitions in CdSe quantum dots doped by Mn atoms. For low concentrations the transitions are spin forbidden. Nevertheless, strong light absorption was experimentally found. To explain this effect we propose a mechanism that includes two or more Mn atoms closely placed to each other. We find that the strongest absorption from the gap is for an antiferromagnetic arrangement.