Nonlinear Dynamics of the Fluctuations of Extrinsic Photoconductivity in Cadmium Sulfoselenide Crystals Doped with Potassium

The results of a quantitative evaluation of the characteristics of the fluctuations of extrinsic photoconductivity in single crystals of cadmium sulfoselenide doped with potassium during their irradiation with extrinsic light are presented. The occurrence of deterministic chaos in the system under investigation is demonstrated based on the description of the dynamics of the occurring processes by the methods of a discrete Fourier transform, flicker-noise spectroscopy, the reconstruction of the dynamics by the time series, and the calculation of the Lyapunov characteristic exponents and the Kolmogorov–Sinai entropy.