Modulation-doped ZnSe/(Zn,Cd,Mn)Se quantum wells and superlattices

The fabrication of "magnetic" two-dimensional electron gases in modulation- doped ZnSe/Zn1-x-yCdxMnySe quantum wells and superlattices is described, wi th a focus on correlating growth conditions with low temperature transport, atomic force microscopy, and photoluminescence. Optimization of the growth parameters results in a two-fold increase in 0.3 K mobility (similar to 23 000 cm(2)/V s) for the host ZnCdSe two-dimensional electron gasses (2DEGs) and a similar relative increase for magnetic 2DEGs. The improved sample gr owth is applied to the fabrication of modulation doped, strained-layer magn etic superlattices containing up to 25 periods of moderately strained quant um wells, without significant reduction in mobility. (C) 2000 American Vacu um Society.