Heavy-Fermion Superconductivity and Localized-Itinerant Crossover in the Kondo Lattice

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Superconductivity in the two-dimensional Kondo lattice model is derived by means of the dual-fermion approach. This framework takes full account of local correlations based on the dynamical mean-field theory and further includes influence of critical antiferromagnetic fluctuations. It is found that pairing with dx2 -y2 symmetry similar to the Hubbard model appears only in the weak-coupling regime. As the coupling is increased, we observe transition to p-wave spin-singlet superconductivity. The emergence of the unconventional p-wave pairing is ascribed to formation of large Fermi surface, which embodies itinerancy of f electrons.

Original languageEnglish
Pages (from-to)326-331
Number of pages6
JournalPhysics Procedia
Publication statusPublished - 2015
Externally publishedYes
Event20th International Conference on Magnetism, ICM 2015 - Barcelona, Spain
Duration: Jul 5 2015Jul 10 2015


  • Kondo lattice
  • dual-fermion approach
  • dynamical mean-field theory
  • odd-frequency pairing

ASJC Scopus subject areas

  • General Physics and Astronomy


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