Robust d-wave pairing correlations in the Heisenberg Kondo lattice model.
The Kondo lattice model enlarged by an antiferromagnetic coupling J AF between the localized spins is here investigated using computational techniques. Our results suggest the existence of a d-wave superconducting phase close to half-filling mediated by antiferromagnetic fluctuations. This establishes a closer connection between theory and heavy fermion experiments than currently provided by the standard Kondo lattice model with J AF=0.
Instituto de Física, Universidade Federal de Uberlândia, CP 593, Uberlândia MG 38400-902, Brazil.
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Xavier
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Dagotto