首页|Two-band model and RVB-type states: Application to Kondo lattices, pyrochlores and Mn-based systems
Two-band model and RVB-type states: Application to Kondo lattices, pyrochlores and Mn-based systems
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NSTL
Elsevier
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 s - d(f) 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 beta-Mn, YMn2, Y1-xScxMn2 systems are discussed, analogies with copper-oxide systems being treated.
NSTL
Elsevier
