Effects of doping on spin correlations in the periodic Anderson model

Abstract

We studied the effects of hole doping on spin correlations in the periodic Anderson model, mainly at the full and three-quarters-full lower bands cases. In the full lower band case, strong anti-ferromagnetic correlations develop when the on-site repulsive interaction strength $U$ becomes comparable to the quasi-particle band width. In the three-quarters full case, a novel kind of spin correlation develops that is consistent with the resonance between a $(\pi ,0)$ and a $(0,\pi )$ spin-density wave. In this state the spins on different sublattices appear uncorrelated. Hole doping away from the completely full case rapidly destroys the long-range anti-ferromagnetic correlations, in a manner reminiscent of the destruction of anti-ferromagnetism in the Hubbard model. In contrast to the Hubbard model, the doping does not shift the peak in the magnetic structure factor from the $(\pi ,\pi )$ position. At dopings intermediate to the full and three-quarters full cases, only weak spin correlations exist.

23 pages plus 13 Postscript figures, revtex, to appear in Phys. Rev. B

Cited by in corpus (12)

• Simulating Physical Phenomena by Quantum Networks
• Kondo effect in triple quantum dots
• Issues and Observations on Applications of the Constrained-Path Monte Carlo Method to Many-Fermion Systems
• Similarities between the Hubbard and Periodic Anderson Models at Finite Temperatures
• Magnetic and Thermodynamic Properties of the Three-Dimensional Periodic Anderson Hamiltonian
• Spin-flux phase in the Kondo lattice model with classical localized spins
• Itinerant Ferromagnetism in the Periodic Anderson Model
• Ferromagnetism in the Strong Hybridization Regime of the Periodic Anderson Model
• Ferromagnetism in the Two-Dimensional Periodic Anderson Model
• Doping-dependent study of the periodic Anderson model in three dimensions
• Diffusion at constant speed in a model phase space
• Magnetic phases of the periodic Anderson model in two dimensions