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The effect of phonon scattering on electrical conductivity (EC) of 2D electron gas in quantum well (QW) systems with a complicated potential profile is described. Dependence of QW electrical conductivity on QW parameters (such as QW width, Fermi level positions etc.) when phonon scattering is employed has been calculated. NDC in EC when it varies with width of the QW has been found.

Thermodynamic properties of degenerate two-dimensional electron gas in complex-shaped quantum well are studied. We determine the equation of state, chemical potential, entropy and heat capacity of the electron gas. An influence of profile and parameters of the quantum well on thermodynamic characteristics are investigated.

We evaluate the hydrogen content in hydrogenated amorphous germanium- and carbon- and also boron- and phosphorus-doped nanocrystalline silicon films obtained by a plasma chemical deposition technique. The films were made of a silicon-containing mixture (silane) heavily diluted with hydrogen and an inert gas (argon), and also methane and germane. In the study we use a combination of Infrared spectroscopy, recoil proton method and X-rays diffraction analysis. The hydrogen content is found to be as great as16 at% for the nanocrystalline films and 24 at% for the alloys. The hydrogen content in the alloys increases with the carbon concentration and decreases with germanium.