Temperature dependence of the lineshape of the 1 s→ 2p0 photothermal ionization of donors in GaAs
Baranovskii S. D , Gel'mont B. L., Golubev V. G., Ivanov-Omskii V. I., Osutin A. V.
A change has been observed in the lineshape of the Is— 2p0 photoexcitation of donors in GaAs which results from a transition from a correlated to a totally random distribution of electrons at impurities as the temperature is raised. A comparison of the experimental results with the results of a numerical simulation reveals the compensation and concentration of the impurities in the ultrapure GaAs.