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Information × Registration Number 0212U005172, 0107U000946 , R & D reports Title The theory of collective effects in low-dimentional condensed mediums and nanostructures popup.stage_title Head Kovalev Aleksandr Semenovich, Registration Date 28-03-2012 Organization B.Verkin Institute for Low Temperature Physics and Engineering of National Academy of Science of Ukraine popup.description2 Physical mechanisms of forming of the exchange interaction in the atomic layers of 3He depending on the density of coverage The aim of the project is to develop and build theoretical concepts and to obtain concrete theoretical results arising from these concepts and explaining the existing experiments in three main directions of modern condensed matter theory: a) kinetic and thermodynamic properties of low dimensional electronic systems, b) magnetic properties of the low-dimensional condensed matter systems, c) dynamics and thermodynamics of low-dimensional and multi-layered elastic media and crystal lattices. We study the anisotropic Heisenberg model on the square and the triangular lattices (in particular, atomic layers of Ne3) to clarify the mechanism of forming of exchange interaction at arbitrary temperatures and arbitrary values of the magnetic field. The phase diagram of the system is obtained, the lines of spin-flop conversion and the lines of phase transitions of first and second orders are found. The heat capacity of the system is calculated, the anomalies near the lines of phase transitions are analyzed. The influence of the electron spin on the noise at charge shuttling in the single-electron transistor is studied. At full polarization of the electrodes in the spectral function of fractional noise there arise giant peaks at low frequencies, the amplitude of which depends on the spin relaxation time. The latter can be found by measuring the noise spectral density Product Description popup.authors Богдан М.М. Копеліович О.І. Кріве І.В. Микитик Г.П. Монарха Ю.П. Пастур Л.А. Сиркін Є.С. Славін В.В. Феодосьев С.Б. Чишко К.О. Чупіс І.Є. Шевченко С.І. popup.nrat_date 2020-04-02 Close