Finite-temperature behavior of the Anderson lattice

摘要: At finite temperature the picture of renormalized-hybridization quasiparticle bands, obtained by various formalisms at T=0, is shown to be inadequate in several respects. The most significant refinement recognizes existence a new type elementary excitation, which simply creates (i.e., unbinds or unscreens) local moment an arbitrary lattice site. These excitations explain continuous crossover between contrasting T\ensuremath{\ll}${T}_{K}$ and T\ensuremath{\gg}${T}_{K}$ behaviors. They also surprisingly rapid weakening, with increasing T, inelastic peaks neutron scattering. concept ``coherence'' clarified. Numerical results are presented for entropy, specific heat, average valence, magnetic susceptibility,