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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TLDR
It is found that a large fraction of the magnetic moments are not quenched down to very low temperatures T, leading to a power-law distribution of Kondo temperatures P(T(K))∼T (K)(α-1), with a nonuniversal exponent α, in a remarkable similarity to the Kondo-disorder scenario found in disordered heavy-fermion metals.
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