Integrable model for two interacting magnetic impurities with {Gamma}{sub 8} ground multiplet
- Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
A model for two Kondo impurities with a fourfold degenerate ground multiplet interacting via the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction is considered. The system is the integer-valent limit of a hybridization model in which electrons are localized (delocalized) in pairs (one at each impurity). The model is mapped onto the Bethe {ital Ansatz} solution of the single SU(N) Anderson impurity in the U{r_arrow}{infinity} limit. The RKKY interaction is introduced {ital a posteriori} as a splitting of the manifold. The occupation of spin states with even and odd parities, the homogeneous and staggered magnetic (and quadrupolar) field susceptibilities, the specific-heat {gamma} coefficient, and the Wilson ratio are studied for the ground state as a function of the ratio of RKKY coupling strength to Kondo temperature. The motivation for this calculation is the rich phase diagram of the alloy series (Ce,La)B{sub 6}. {copyright} {ital 1999} {ital The American Physical Society}
- OSTI ID:
- 304255
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 5 Vol. 59; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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