Samoylov A. Electrotransport and structure in layered compounds of the 1-2-3 single crystals system, diselenide of niobium and related oxides.

The purpose of work was a decision of task, in relation to establishment of physical conformities to the law of evolution of Electrotransport descriptions of the stratified single-crystal connections on the basis of the system 1-2-3 and DPM NbSe2 with the near parameter of anisotropy and concomitant oxides in the process of change of their structural composition and influence of hydrostatical high-pressure. Object of research:Is a research object a dynamics of transfer of charge, redistribution components and phase stratification in the single-crystals of Y1-zRezBa2Cu3O7-? (Re=Pr, Ho) and Nb1-xSnxSe2, doped by deputizing elements, at temperatures higher critical. Scientific novelty of the got results: 1. Is it first rotined that at growth of concentration of Pr in an interval 0,0<z<0,5 there is substantial displacement of temperature areas which answer the transition of kind metal-dielectric and to the mode of realization of pseudocrack anomaly. Thus dependence of surplus conductivity on the temperature described exponential temperature dependence. 2. Is it first set that lowering of degree doped oxygen of single-crystals of HoBa2Cu3O7-? results in the uneven distributing of oxygen on volume crystal and to formation of phases with different critical temperatures. Induciruemoe high pressure does the redistribution of лабильного oxygen result in strengthening of phase stratification in the volume of single-crystals of HoBa2Cu3O7-? with the deficit of oxygen and stimulation in them processes of ascending diffusion phase-to-phase with the different degree of deviation from oxygen stehiometry. 3. It is experimentally rotined first, that features of conduct of электросопротивления from a temperature in connection of Nb1-xSe2Snx, related to the origin of WCD-transition, absent for all of investigational concentrations of admixtures of tin. A basic contribution to the increase of Ts at affecting of hydrostatical high-pressure connection of Nb1-xSe2Snx makes alteration to the closeness of the states at the level of Fermi. Thus a phonon spectrum is displaced toward high-frequencies.