Uniform hopping approach to the ferromagnetic Kondo model at finite temperature

摘要: We study the ferromagnetic Kondo model with classical corespins via unbiased Monte Carlo simulations and derive a simplified for treatment of core spins at any temperature. Our captures main aspects can easily be evaluated both numerically analytically. It provides better qualitative understanding physical features rationalizes results including spectral density A k (ω) one-dimensional (ID) chain nearest-neighbor Coulomb repulsion. By calculating specific heat susceptibility systems up to size 16 3 , we determine Curie temperature 3D one-orbital double-exchange model, which agrees experimental values.