Magnetic properties of the extended periodic Anderson model

Details Magnetic properties of the extended periodic Anderson model Magnetic properties of the extended periodic Anderson model

2008-01-23

arxiv.org/abs/0801.3668v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures, accepted for publication in JPSJ

Scientific paper

10.1143/JPSJ.77.033704

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.

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