Short-range antiferromagnetic correlations in Kondo insulators

Details Short-range antiferromagnetic correlations in Kondo insulators Short-range antiferromagnetic correlations in Kondo insulators

1999-04-15

arxiv.org/abs/cond-mat/9904221v3

Physics

Condensed Matter

Strongly Correlated Electrons

13 pages, 13 figures. To be published in Physics Letters A

Scientific paper

10.1016/S0375-9601(99)00837-3

We study the influence of short range antiferromagnetic correlations between local $f$-electrons on the transport and thermodynamic properties of Kondo insulators, as first proposed by Coqblin et al. for metallic heavy fermions. The inter-site magnetic correlations produce an effective bandwidth for the $f$-electrons. They are treated on the same footing as the local Kondo correlations such that two energy scales appear in our approach. We discuss the competition between these two scales on the physical properties.

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