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Free Fermion limit of the strong-coupling Kondo lattice model

Journal article
Authors Stellan Östlund
Published in Physica B
Volume 403
Pages 1437
Publication year 2008
Published at Department of Physics (GU)
Pages 1437
Language en
Links doi:10.1016/j.physb.2007.10.165
Keywords Kondo lattice, metal-insulator transition, strongly correlated electrons, Mott transition
Subject categories Condensed Matter Physics, Superconductivity

Abstract

The strong coupling Kondo lattice model is an interacting dense Fermi system for which conventional Fermi gas analysis has thus far failed. We will show that there exists, in fact, an exact transformation that maps the singlet Mott insulator to a Fermi vacuum and simultaneously maps bare c-electron and f-electron operators to Fermion electron and hole quasiparticles. For strong coupling, the quasiparticle dynamics are very simple. The complexity of describing the dynamics of the conventional electron operators in the singlet Mott insulator can be reduce

Page Manager: Webmaster|Last update: 9/11/2012
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