Ground State of the Periodic Anderson Hamiltonian

Abstract

Specific heat and magnetic susceptibility of the periodic Anderson Hamiltonian are discussed generally, on the basis of the microscopic Fermi liquid theory. It is pointed out that the Wilson ratio in the periodic system can take values over a different range from that of a single impurity system. This fact is related to coherent phenomena, such as decrease of the T-linear coefficient of the specific heat, observed in Kondo lattice systems. The enhancement factor of T-linear specific heat is calculated by the perturbation method with respect to Coulomb repulsion U. The local electronic structure of the paramagnetic ground state is shown to have a similar character to that of the singlet ground state of the dilute case by the discussion based on the Anderson orthogonality theorem.