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Information × Registration Number 0207U004745, 0104U000655 , R & D reports Title Influence of electron correlations effects to optical and magnetic properties of nanomaterials popup.stage_title Head Cheranovski Vladislav Olegovich, Registration Date 14-08-2007 Organization Kharkov national university named after V.N. Karazin popup.description2 .Objects of investigation - internal energy, specific heat and magnetic susceptibility of nano-structured materials, which are described by anisotropic spin ladder model; methods of theoretical study of electron structure of nano-structured materials on the base of coupled cluster theory.The purpose of investigation is to perform theoretical study of the temperature and field dependencies of internal energy, specific heat and magnetic susceptibility of anisotropic spin ladders. To determine the peculiarities of the model electron structure, which are responsible for a number of peaks in temperature dependence of the specific heat.In this work the energy spectra and thermodynamics properties of nono-systems having the structure of spin ladder are studied analytically and numerically. It is shown the existence of quantum first order phase transitions. A simple formula for evaluation of the specific heat in case of absence of low-energy bound states is derived. It is shown the existence up to 4 peaks in temperature dependence of specific heat. Product Description popup.authors popup.nrat_date 2020-04-02 Close