Fig. 1. Adjustment of conductivity dependence of temperature for 2D p-GaAs system sample for different carrier densities.

Fig. 2. ln(σ) as (a) T^–1/2, (b) T^–1/3 and (c) T^–1 of the sample and linear fits where the prefactor σ₀ is independent on temperature.

Fig. 3. Function lnW versus lnT for various densities.

Fig. 4. lnW as a function lnT and linear fits for both cases: T < T_c and T > T_c.

Fig. 5. The exponent p as a function of carrier densities.

Fig. 6. (a) Activation energy versus n_p in the insulating phase. (b) Characteristic temperature for case of Efros-Shklovskii and Mott hopping.