Abstract:
Treatment with low-energy ions and measurements of electrical parameters of samples have been used to study the defect structure of Cd$_x$Hg$_{1-x}$Te films grown by liquid-phase epitaxy. The films contain neutral defects supposedly associated with tellurium nanoinclusions. Ion treatment electrically activates these defects, with a high concentration of donor centers ($\sim$10$^{17}$ cm$^{-3}$) created in the films. These defects decompose in $\sim$10$^3$ min of aging at room temperature. Then the properties of the material are determined by the concentration of residual donors, which is found to be very low (down to $\sim$10$^{14}$ cm$^{-3}$) for the films under study.