Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2009-11-11
Physica B, volume 404 (2009) 2904-2907
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 3 eps figures; published in the Proceedings of the International Conference on Strongly Correlated Systems (SCES) 200
Scientific paper
Antiferromagnetic heavy fermion metals close to their quantum critical points display a richness in their physical properties unanticipated by the traditional approach to quantum criticality, which describes the critical properties solely in terms of fluctuations of the order parameter. This has led to the question as to how the Kondo effect gets destroyed as the system undergoes a phase change. In one approach to the problem, Kondo lattice systems are studied through a self-consistent Bose-Fermi Kondo model within the Extended Dynamical Mean Field Theory. The quantum phase transition of the Kondo lattice is thus mapped onto that of a sub-Ohmic Bose-Fermi Kondo model. In the present article we address some aspects of the failure of the standard order-parameter functional for the the Kondo-destroying quantum critical point of the Bose-Fermi Kondo model.
Kirchner Stefan
Si Qimiao
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