Dynamical mean-field study of ferromagnetism in the periodic Anderson model

Abstract

The ferromagnetic phase diagram of the periodic Anderson model is calculated using dynamical mean-field theory in combination with the modified perturbation theory. Concentrating on the intermediate valence regime, the phase boundaries are established as function of the total electron density, the position of the atomic level and the hybridization strength. The main contribution to the magnetic moment stems from the f-electrons. The conduction band polarization is, depending on the system parameters either parallel or antiparallel to the f-magnetization. By investigating the densities of states, one observes that the change of sign of the conduction band polarization is closely connected to the hybridization gap, which is only apparent in the case of almost complete polarization of the f-electrons. Finite-temperature calculations are also performed, the Curie temperature as function of electron density and f-level position are determined. In the intermediate-valence regime, the phase transitions are found to be of second order.

12 pages, 11 figures, accepted by Phys. Rev. B

References in corpus (7)

• Large-q asymptotics of the random bond Potts model
• The low-energy scale of the periodic Anderson model
• "Exhaustion" Physics in the Periodic Anderson Model using Iterated Perturbation Theory
• Evidence for exhaustion in the conductivity of the infinite-dimensional periodic Anderson model
• The asymmetric single-impurity Anderson model - the modified perturbation theory
• From ferromagnetism to spin-density wave: Magnetism in the two channel periodic Anderson model
• Modified Perturbation Theory Applied to Kondo-Type Transport through a Quantum Dot under a Magnetic Field

Cited by in corpus (19)

• Disorder-Driven Non-Fermi Liquid Behavior of Correlated Electrons
• Segmented Band Mechanism for Itinerant Ferromagnetism
• Exact Ground States of the Periodic Anderson Model in D=3 Dimensions
• Dynamical mean-field study of partial Kondo screening in the periodic Anderson model on the triangular lattice
• Localization effects and inelastic scattering in disordered heavy electrons
• Anderson lattice with explicit Kondo coupling: general features and the field-induced suppression of heavy-fermion state in ferromagnetic phase
• Itinerant Ferromagnetism in the Periodic Anderson Model
• Mechanism for transitions between ferromagnetic and antiferromagnetic orders in $d$-electron metallic magnets
• Strong-coupling scenario of a metamagnetic transition
• Insight into the temperature dependent properties of the ferromagnetic Kondo lattice YbNiSn
• Crossover from conventional to inverse indirect magnetic exchange in the depleted Anderson lattice
• Ferromagnetism in the Two-Dimensional Periodic Anderson Model
• Doping-dependent study of the periodic Anderson model in three dimensions
• Influence of Band and Orbital Degeneracies on Ferromagnetism in the Periodic Anderson Model
• Disordered Kondo Nanoclusters: Effect of Energy Spacing
• Ferromagnetism and disorder: A dynamical mean-field study
• Local Density of States in the Antiferromagnetic and Ferromagnetic Kondo Models
• Impact of correlations on topology in Kane-Mele model decorated with impurities
• Magnetic phases of the periodic Anderson model in two dimensions