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Intersite coupling effects in a Kondo lattice

S. Nakatsuji·S. Yeo·L. Balicas·Z. Fisk·P. Schlottmann·P. G. Pagliuso·N. O. Moreno·J. L. Sarrao·J. D. Thompson
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Abstract

The La dilution of the Kondo lattice CeCoIn_5 is studied. The scaling laws found for the magnetic susceptibility and the specific heat reveal two well-separated energy scales, corresponding to the single impurity Kondo temperature T_K and an intersite spin-liquid temperature T^*. The Ce-dilute alloy has the expected Fermi liquid ground state, while the specific heat and resistivity in the dense Kondo regime exhibit non-Fermi-liquid behavior, which scales with T^*. These observations indicate that the screening of the magnetic moments in the lattice involves antiferromagnetic intersite correlations with a larger energy scale in comparison with the Kondo impurity case.

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S. Nakatsuji, S. Yeo, L. Balicas, Z. Fisk, P. Schlottmann, P. G. Pagliuso, N. O. Moreno, J. L. Sarrao, J. D. Thompson. 2002-05-24. Intersite coupling effects in a Kondo lattice. https://doi.org/10.1103/physrevlett.89.106402

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