Search academic texts

Information × Registration Number 0218U002421, 0116U007068 , R & D reports Title Electron-phonon processes and phase transformations in the classical and quantum condensed media popup.stage_title Head Poluektov Yuri, Доктор фізико-математичних наук Registration Date 06-03-2018 Organization National Science Center "Kharkiv Institute of Physics and Technology popup.description2 Thermodynamics of the Fermi gas in conditions of the confined geometry, namely for the two-dimensional case of a quantum well and the one-dimensional case of a nanotube, has been built. Thermodynamic potential, energy, density, entropy, equations of states, heat capacities and compressibilities were calculated for arbitrary temperatures by means of the introduced standard functions and the effects of low dimensionality were studied. The role of three-body interactions was studied in gases and liquids. It is proposed a method of self-consistent description of a gas of phonons in a lattice which generalizes the Debye model to account for phonon-phonon interaction. The idea of "self-consistent" phonons which speed depends on temperature is introduced, and thermodynamics of such "self-consistent" phonons is built. A modification to the melting criteria is considered within the developed approach. Morphological stability of the interphase boundaries in a multiphase system and the propagation of the fronts of phase transformations in the phase field model and modified Cahn-Hilliard models have been investigated. The problem about stability of the three diffusively interacting boundaries is solved in the quasistationary approximation. There are obtained the exact solutions of the type of a travelling with a constant velocity wave for the Penrose-Fife phase field model and the Cahn-Hilliard nonstandard viscous system. Product Description popup.authors Абизов Олександр Сергійович Безуглий Олексій Іванович Давидов Леонід Миколайович Мчедлов-Петросян Петро Отарович Осмаєв Олег Аданійович Полуектов Юрій Матвійович Сорока Олексій Олександрович Шаповалов Роман Володимирович popup.nrat_date 2020-04-02 Close