SPIN-POLARIZATION EFFECTS IN (AB(2))(N) POLYMERIC CHAINS

The techniques of renormalization of interactions and transfer matrice s are used to investigate spin-polarization effects in (AB)(2) polymer ic chains, within a Hartree-Fock solution to a diagonal Hubbard Hamilt onian approximation. The electronic structure of the infinite chain is obtained and the corresponding magnetization is examined for differen t values of the one-center repulsion integrals J. It is observed that one-third of the total electronic states available are associated to n ondispersive states localized on the B sites; for half-filled systems the conductive and magnetic properties of the chain are obtained as a function of J. The damped spin density wave resulting from a substitut ional impurity on an A center is also calculated.