Key points are not available for this paper at this time.
The results of detailed investigations of the conductivity and Hall effect in gated single-quantum-well GaAs/InGaAs/GaAs heterostructures with two-dimensional electron gas are presented. A successive analysis of the data has shown that the conductivity is diffusive for k₅l=25-2. The absolute value of the quantum corrections for k₅l=2 at low temperature is not small; e. g. , it is about 70% of the Drude conductivity at T=0. 46K. For k₅l=2--0. 5 the conductivity looks like the diffusive one. The temperature and magnetic field dependences are qualitatively described within the framework of the self-consistent theory of Vollhardt and W\"olfle. The interference correction is therewith close in magnitude to the Drude conductivity so that the conductivity becomes significantly less than e^2/h. We conclude that the temperature and magnetic field dependences of the conductivity in the whole k₅l range are due to changes of the quantum corrections.
Minkov et al. (Wed,) studied this question.