Two-band model and RVB-type states: application to Kondo lattices, pyrochlores and Mn-based systems
arXiv:2203.02319 · doi:10.1016/j.physb.2022.413780
Abstract
An exotic fractionalized Fermi-liquid FL theory of metallic systems, which combines resonant-valence-bond (RVB) state and the band of current carriers, is treated. An application of this theory to spin-liquid, antiferromagnetic and nearly antiferromagnetic systems is proposed with the use of various bosonic and fermionic representations, a comparison with perturbation theory in the exchange model being performed. The topological aspects including formation of the small Fermi surface are treated. In the case of narrow bands (strong correlations), the ground state is considered as a direct product of RVB and dopon or Weng's fermion states. Examples of Kondo lattices, doped pyrochlores, and metallic -Mn, YMn, YScMn systems are discussed, analogies with copper-oxide systems being treated.
arXiv comment5 pages
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