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Paper   IPM / Physic / 8834
School of Physics
  Title:   Kondo Lattice Model at Half-Filling
1.  R. Nourafkan
2.  N. Nafari
  Status:   Published
  Journal: J. Physics: Condens. Matter
  Vol.:  20
  Year:  2008
  Pages:   255231
  Supported by:  IPM
The single- and two-channel Kondo lattice model consisting of localized spins interacting antiferromagnetically with the itinerent electrons, are studied using dynamical mean field theory. As an impurity solver for the effective single impurity Anderson model we used the exact diagonalization (ED) method. Using ED allowed us to perform calculations for low temperatures and couplings of arbitrary large strength. Our results for the single-channel case confirm and extend the recent investigations. In the two-channel case we find a symmetry breaking phase transition with increasing coupling strength.

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