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Low energy scales of Kondo lattices: mea...
Burdin, Sébastien...
Low energy scales of Kondo lattices: mean-field perspective by Burdin, Sébastien ( Author )
N.A
11-03-2009
A review of the low temperature properties of Kondo lattice systems is presented within the mean-field approximation, focusing on the different characteristic energy scales. The Kondo temperature, T_K, and the Fermi liquid coherence energy, T_0, are analyzed as functions of the electronic filling, the shape of the non-interacting density of states, and the concentration of magnetic moments. These two scales can vanish, corresponding to a breakdown of the Kondo effect when an external magnetic field is applied. The Kondo breakdown can also be reached by adding a superexchange term to the Kondo lattice model, which mimics the intersite magnetic correlations neglected at the mean-field level.
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Article
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36.88 KB
English
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MYR 0.00
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https://arxiv.org/abs/0903.1942
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