Abstract: A general theory of dielectric loss mechanism is considered, in which electromagnetic wave absorption is accompanied by the excitation of sound at the same frequency. Expressions are derived for the imaginary part of the permittivity tensor, valid for insulators having any elastic anisotropy. The example of hexagonal crystals is discussed and explicit expressions are found for these losses in terms of properties of the material

Abstract: Experimental relationships are presented between the resistivity and thickness of varistor ceramic samples based on zinc oxide, indicating that electrotransport is of the percolation type. It was found that the main cause of this in the ceramic concerned, with specific barriers between grains in the form of a thin insulator layer with adjacent depleted space charge regions of low-resistivity zinc oxide grains, may be the statistical spread of the layer thicknesses. The application of the percolation conduction model for such objects is discussed

Abstract: At low temperatures the compounds containing KF can exhibit a luminescence spectrum at hν>9 eV due to the radiative recombination of electrons with unrelaxed cation holes (hot cross luminescence), the study of which should give information on the possibility of self-trapping of the cation holes in ionic crystals

Abstract: It was found that by varying the relative orientation of the polarization vector of laser radiation and the crystal axes, one can accelerate or prevent laser-enhanced diffusion of light impurities in crystals. The occupation of various impurity positions in the crystal must then vary and this may allow observation of optical dichroism in the impurity absorption

Abstract: The energy level positions for dislocations in alkali halide crystals as determined by various methods differ considerably. For instance, the dislocation sates manifested in deformation luminescence are almost three times as deep as those manifested in the photoplastic effect. A model is proposed whereby these states can be related. It is postulated that states of one-dimensional dislocation bands appear in the photoplastic effect, and states split off from such bands in the field of anionic vacancies in deformation luminescence. The results of calculations for dislocations in sodium chloride agree fairly well with experiment

Abstract: We carried out a neutron-diffraction determination of the compression curves of deuterides of metals belonging to the VIII-B group of nickel and palladium at pressures up to 7.5 GPa. A special feature of our experiments was that deuterium was introduced into a metal directly in a high-pressure chamber fitted wih diamond anvils, which was then used in a neutron diffraction study

Abstract: A study was made of samples containing 3,65.10 −2 and 1,6.10 −1 mol.% of the impurity. The samples were heated to 600 o C, and then quenched by cooling in air. The results demonstrated dissociation of the impurity complexes, and explanainated the anomalous deformation-rate dependence of the yield stress

Abstract: Our aim is to develop a theory of the density of states of conduction electrons in metals subjected to a magnetic field using coherent states that are natural states of electrons in metals in the presence of a magnetic field

Abstract: An experimental investigation was made of the time dependences of the intensity of a luminescence band representing free excitons in pure crystals of the layer semiconductor e-GaSe and those containing 0.5 at.% Zn and 0.2 at.% Tl. These dependences were obtained at different excitation rates. The times of formation and dissociation of free excitons were determined. The decay times were explained qualitatively by the formation of exciton molecules

Abstract: The effect of ordering in crystalline solid solutions on the phonon relaxation time, on the thermal conductivity, and absorption of ultrasound is studied. The onset of long-range order and clustering is considered. The modification of the composition, temperature, and frequency dependences of transport coefficients due to ordering is discused

Abstract: The low-temperature thermal conductivity of metals containing quantum thermalized defects is investigated. It is shown that the main contribution to the thermal conductivity is due to electrons scattered from such defects and the temperature dependence of thermal conductivity κ is determined. The effect of cluster formation of defects on the magnitude of κ is also discussed