Ferromagnetism in the Strong Hybridization Regime of the Periodic Anderson Model
arXiv:cond-mat/0308002 · doi:10.1103/PhysRevB.68.064403
Abstract
We determine exactly the ground state of the one-dimensional periodic Anderson model (PAM) in the strong hybridization regime. In this regime, the low energy sector of the PAM maps into an effective Hamiltonian that has a ferromagnetic ground state for any electron density between half and three quarters filling. This rigorous result proves the existence of a new magnetic state that was excluded in the previous analysis of the mixed valence systems.
Accepted in Phys. Rev. B