A van Hemmen-Kondo model for disordered strongly correlated electron systems

Details A van Hemmen-Kondo model for disordered strongly correlated electron systems A van Hemmen-Kondo model for disordered strongly correlated electron systems

2010-02-03

arxiv.org/abs/1002.0762v1

Physics

Condensed Matter

Strongly Correlated Electrons

14 pages, 4 figures, accepted for publication in Phys. Rev. B

Scientific paper

We present here a theoretical model in order to describe the competition between the Kondo effect and the spin glass behavior. The spin glass part of the starting Hamiltonian contains Ising spins with an intersite exchange interaction given by the local van Hemmen model, while the Kondo effect is described as usual by the intrasite exchange $J_K$. We obtain, for large $J_K$ values, a Kondo phase and, for smaller $J_K$ values, a succession, with decreasing

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