Boosting the Curie temperature with correlations in diluted magnetic   semiconductors
  We present a quantitative theory for the effects of correlated doping on the ferromagnetism of diluted magnetic semiconductors. It predicts that room temperature ferromagnetism should be possible in homogeneous, but correlated, samples of Mn$_x$Ga$_{1-x}$As. The theory predicts lower critical temperatures for Mn$_x$Ga$_{1-x}$N. 
Georges Bouzerar, Timothy Ziman, Josef Kudrnovsky