Epitaxial Al$_{x}$Ga$_{1-x}$As : Mg alloys with different conductivity types

The structural, optical, and energy properties of epitaxial Al$_{x}$Ga$_{1-x}$As : Mg/GaAs(100) heterostructures at different levels of doping with Mg are studied by high-resolution X-ray diffraction analysis and Raman and photoluminescence spectroscopies. It is shown that, by choosing the technological conditions of Al$_{x}$Ga$_{1-x}$As : Mg alloy production, it is possible to achieve not only different conductivity types, but also substantially different charge-carrier concentrations in an epitaxial film.