2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/29887An integrable Kondo lattice model, which describes a strongly correlated electron host interacting with a spin-1/2 lattice, is proposed. It is found that with the variations of the Kondo coupling J, the hole concentration n_h and the magnetic field H, the system may fall into a variety of phases. The phase boundaries of the ground state are determined exactly. The marginal excitations and the quantum critical behavior at the phase boundaries are discussed.5 pages, Revtex, no figureStrongly Correlated Electronstext