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

@article{Kaul2007StronglyIP,
  title={Strongly inhomogeneous phases and non-Fermi-liquid behavior in randomly depleted Kondo lattices},
  author={Ribhu K. Kaul and Matthias Vojta},
  journal={Physical Review B},
  year={2007},
  volume={75},
  pages={132407}
}
  • R. Kaul, M. Vojta
  • Published 28 February 2006
  • Materials Science
  • Physical Review B
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… 
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References

SHOWING 1-10 OF 15 REFERENCES
Two-fluid behavior of the Kondo lattice in the 1 ∕ N slave boson approach
It has been recently shown by Nakatsuji, Pines, and Fisk [S. Nakatsuji, D. Pines, and Z. Fisk, Phys. Rev. Lett. 92, 016401 (2004)] from the phenomenological analysis of experiments in
Disorder-Driven Non-Fermi-Liquid Behavior in Kondo Alloys
We show how a model of disordered Anderson lattices can account for many non-Fermi-liquid features observed in some Kondo alloys. Because of the exponential nature of the Kondo temperature scale
Non-Fermi-liquid behavior in U and Ce alloys: Criticality, disorder, dissipation, and Griffiths-McCoy singularities
In this paper we provide a theoretical basis for the problem of Griffiths-McCoy singularities close to the quantum critical point for magnetic ordering in U and Ce intermetallics. We show that the
Intersite coupling effects in a kondo lattice.
TLDR
Observations indicate that the screening of the magnetic moments in the lattice involves antiferromagnetic intersite correlations with a larger energy scale in comparison with the Kondo impurity case.
Weak magnetism and non-Fermi liquids near heavy-fermion critical points
This paper is concerned with the weak-moment magnetism in heavy-fermion materials and its relation to the non-Fermi liquid physics observed near the transition to the Fermi liquid. We explore the
From the local Fermi liquid to the heavy Fermi liquid
Magnetic-ion concentration dependence of some physical quantities in heavy-fermion systems are investigated on the basis of the periodic Anderson model with randomly distributed sites without f
Heavy-fermion behavior and the single-ion Kondo model.
TLDR
The results strongly suggest that intersite correlations do not play the expected important role and that the high specific heat reported for CePb/sub 3/ is mainly a manifestation of the single-ion Kondo resonance.
Kondo effect in disordered systems.
TLDR
The calculations, based on a slave-boson approach, show that the probability distribution P(T k ) for Kondo temperatures can be related to the local-density-of-states fluctuations induced by localization effects.
Coherence scale of the kondo lattice
It is shown that the large- N approach yields two energy scales for the Kondo lattice model. The single-impurity Kondo temperature, T(K), signals the onset of local singlet formation, while
...
1
2
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