Новий метод розрахунку енергетичного спектру та дослідження електричних характеристик систем з квантовими точками

Abstract

The configurational representation of model in which periodically spaced Anderson-Hubbard centers are introduced into narrow-band metal has been studied. Besides the interactions between localized magnetic moments and strong on-site Coulomb interaction, the model takes into account the hybridization with conduction band which results in the indirect hopping and indirect exchange interaction. The effective Hamiltonian for the case of strong on-site Coulomb correlation has been obtained and Green functions for band and localized electrons have been found. On this base, the energy spectrum has been investigated and effective masses of current carriers have been calculated as functions of model parameters, temperature and external pressure.