Strongly inhomogeneous phases and non-Fermi-liquid behavior in randomly depleted Kondo lattices

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Ribhu K. Kaul - , Duke University, Karlsruhe Institute of Technology (Author)
  • Matthias Vojta - , Karlsruhe Institute of Technology, University of Cologne (Author)

Abstract

We investigate the low-temperature behavior of paramagnetic Kondo lattices upon random depletion of the local f moments by using strong-coupling arguments and solving SU (N) saddle-point equations on large lattices. For a large range of intermediate doping levels, between the coherent Fermi-liquid of the dense lattice and the single-impurity Fermi liquid of the dilute limit, we find strongly inhomogeneous states that exhibit distinct non-Fermi-liquid characteristics. The interplay of dopant disorder and strong interactions leads to rare weakly screened moments which dominate the bulk susceptibility. Our results are relevant to compounds like Cex La1-x Co In5 and Cex La1-x Pb3.

Details

Original languageEnglish
Article number132407
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume75
Issue number13
Publication statusPublished - 25 Apr 2007
Peer-reviewedYes
Externally publishedYes