This relates to the lowering of the low-frequency maximum intensity. ![]() The coefficient of thermal conductivity and the dependence k (T) in the range of helium temperatures were measured using the stationary method.Īt a fixed temperature, the growing of z is accompanied by a shift of the low-frequency (boson) maximum in AsyS100-y glasses in the high-frequency region of the spectrum from 19 cm-1 (z = 2.1) to 26 cm-1 (z = 2.4). Investigation of impulse laser threshold damage of glasses and films was carried out at 0.69 µm and duration of impulse, τ= 40 ns. The finding of the atomic composition percentage of amorphous films was carried out by synchrotron and X-ray photoelectron spectroscopy, and the concentration profile of the film elements was determined by the method of secondary ion mass spectroscopy. The analysis of the structure of chalcogenide non-crystalline semiconductors was carried out using Raman spectroscopy. The investigations are based on a set of advanced techniques for the study of structure, composition and properties of chalcogenide glassy semiconductors. Also, some question concerning the coordination dependence of elastic modules, physical properties and connectivity between the matrix and the cluster structure of glasses within the framework of the topological-cluster concept of Thorpe-Phillips is considered. Information is given about the occurrence of excessive low-frequency vibration spectrum and the peak density of state in non-crystalline materials. ![]() ![]() Examples of deviations from the universal anomalies of k (T) of some chalcogenide glasses around “plateau” region are demonstranted. In the review part is the brief information about the low-temperature thermal conductivity of non-crystalline materials, containing so-called universal anomalies of k (T) dependences in the region of helium temperatures. The monograph is devoted to the complex study of the AsyS100-y concentration (coordination) characteristics of the thermal conductivity k (T) temperature dependence in wide-bandgap chalcogenide glasses at a temperature interval between 2.5 and 100 K, in order to find composition of glasses with high thermal conductivity and a high connectivity of structural matrixes for power optics.
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