Abstract
The coupling of magnons and electrons (or holes) in Kondo lattices yield composite states whose spectra depend on the interplay of the Kondo exchange and the RKKY interaction. These composite states can be coupled constituting electron–electron, hole–hole and even electron–hole pairs. Such particle gas can present the characteristic features of either antiferromagnetic heavy-fermion superconductors or insulating exciton condensed states.
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