Magnetic phases in the correlated Kondo-lattice model

Abstract

We study magnetic ordering of an extended Kondo-lattice model including an additional on-site Coulomb interaction between the itinerant states. The model is solved in the dynamical mean-field theory using Wilson's numerical renormalization group approach as impurity solver. For a bipartite lattice we find at half filling the expected antiferromagnetic phase. Upon doping this phase is gradually suppressed and hints towards phase separation are observed. For large doping the model exhibits ferromagnetism, the appearance of which can at first sight be explained by Rudermann-Kittel-Kasuya-Yosida interaction. However, for large values of the Kondo coupling $J$ significant differences to a simple Rudermann-Kittel-Kasuya-Yosida picture can be found. We furthermore observe signs of quantum critical points for antiferromagnetic Kondo coupling between the local spins and band states.

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• Convergence acceleration and stabilization for dynamical-mean-field-theory calculations
• Charge order in Kondo lattice systems
• Quantum phase transitions in the extended periodic Anderson model
• Electronic Order with Staggered Kondo and Crystalline Electric Field Singlets
• Low-energy properties of the Kondo lattice model
• Competition of striped magnetic order and partial Kondo screened state in the Kondo lattice model
• The ground state magnetic phase diagram of the ferromagnetic Kondo-lattice model
• Magnetic Phase Diagrams of Manganites-like Local-Moment Systems with Jahn-Teller distortions
• Magnetic properties of the extended periodic Anderson model
• Fine structure of spectra in the antiferromagnetic phase of the Kondo lattice model
• Effect of Disorder on Fermi surface in Heavy Electron Systems
• Anisotropic Magnetic Response in Kondo Lattice with Antiferromagnetic Order
• Quasiparticle Band Structure and Spin Excitation Spectrum of the Kondo Lattice
• Dilute magnetic moments in an exactly solvable interacting host
• The ground state phase diagram of the diluted ferromagnetic Kondo-lattice model
• Photo-emission signatures of coherence breakdown in Kondo alloys: dynamical mean-field theory approach