Magnetic properties of the extended periodic Anderson model
arXiv:0801.3668 · doi:10.1143/JPSJ.77.033704
Abstract
We study magnetic properties of the extended periodic Anderson model, which includes electron correlations within and between itinerant and localized bands. By combining dynamical mean-field theory with the numerical renormalization group we calculate the sublattice magnetization and the staggered susceptibility to determine the phase diagram in the particle-hole symmetric case. We find that two kinds of magnetically ordered states compete with the Kondo insulating state at zero temperature, which induces non-monotonic behavior in the temperature-dependent magnetization. It is furthermore clarified that a novel magnetic metallic state is stabilized at half filling by the competition between Hund's coupling and the hybridization.
4 pages, 4 figures, accepted for publication in JPSJ
References in corpus (6)
- Sum-rule Conserving Spectral Functions from the Numerical Renormalization Group
- A Numerical Renormalization Group approach to Green's Functions for Quantum Impurity Models
- Spin Precession and Real Time Dynamics in the Kondo Model: A Time-Dependent Numerical Renormalization-Group Study
- Orbital selective Mott transition in multi-band systems: slave-spin representation and dynamical mean-field theory
- Magnetic phases in the correlated Kondo-lattice model
- Quantum phase transitions in the extended periodic Anderson model