Co-operative Kondo effect in the two-channel Kondo lattice

Piers Coleman, A. M. Tsvelik, Natan Andrei, H. Y. Kee

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

We examine how the properties of a single-channel Kondo lattice model are modified by additional screening channels. Contrary to current wisdom, additional screening channels appear to constitute a relevant perturbation which destabilizes the Fermi liquid. This instability involves two stages. When a heavy Fermi surface develops, it generates zero modes for Kondo singlets to fluctuate between screening channels of different symmetry, producing a divergent composite pair susceptibility. Additional screening channels couple to these divergent fluctuations, promoting an instability into a superconducting state with long-range composite order. We discuss possible implications for heavy fermion superconductivity.

Original languageEnglish (US)
Pages (from-to)3608-3628
Number of pages21
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume60
Issue number5
DOIs
StatePublished - 1999

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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