Disordered correlated Kondo-lattice model

摘要: Abstract We propose a self-consistent approximate solution of the disordered Kondo-lattice model (KLM) to get interconnected electronic and magnetic properties ‘local-moment’ systems like diluted ferromagnetic semiconductors. Aiming at ( A 1 - x M ) compounds, where non-magnetic atoms distributed randomly over crystal lattice, we present theory which treats subsystems itinerant charge carriers localized moments in homologous manner. The coupling between due electrons (holes) is treated by modified RKKY-theory maps KLM onto an effective Heisenberg model. exchange integrals turn out be functionals self-energy guaranteeing self-consistency our theory. moment are both CPA-type methods. discuss detail dependencies key-terms such as long-range oscillating integrals, ‘the local-moment’ magnetization, electron spin polarization, Curie temperature well magnonic quasiparticle densities states on concentration ions, carrier n, J, temperature. shape range strongly x-dependent. disorder causes anomalies spectrum especially low-dilution regime, not observed mean field approximation.