There is a new publication by ZOTERAC members in the Journal of Alloys and Compounds. Tamayo-Arriola et al. just published "Ga-doping of nonpolar m-plane ZnMgO with high Mg contents". The article can be accessed clicking here.
Extracted electron concentration as a function of Mg, for different Ga doping levels. The symbol type indicates the technique employed, and the colors the Ga doping level (low: ; high: ). The red shaded area shows the electron concentration range beyond the detection limit for all techniques. The data points within this shaded area correspond to samples fully depleted where the electron concentration could not be extracted. From Tamayo-Arriola et al. Journal of Alloys and Compounds 2018. https://doi.org/10.1016/j.jallcom.2018.06.298