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, T0, 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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© 2009 Springer Science + Business Media B.V
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Burdin, S. (2009). Low Energy Scales of Kondo Lattices: Mean-field Perspective. In: Zlatić, V., Hewson, A.C. (eds) Properties and Applications of Thermoelectric Materials. NATO Science for Peace and Security Series B: Physics and Biophysics. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-2892-1_18
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DOI: https://doi.org/10.1007/978-90-481-2892-1_18
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-2891-4
Online ISBN: 978-90-481-2892-1
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