Metal-insulator transition induced by fluctuations of the magnetic potential in the quantum well of the semiconductor structure with magnetic impuritiesʼ δ-layer

► Metal-insulator transition in semiconductor heterostructure with magnetic impurities. ► Fluctuating magnetic potential generated by the impurity magnetization. ► Decomposing system into areas of strongly differing local concentrations of charge carriers. ► Thermally activated conductivity induced by Coulomb blockade in composite medium.