Magnetic quantum phase transition in an anisotropic Kondo lattice

Abstract

The quantum phase transition between paramagnetic and antiferromagnetic phases of the Kondo lattice model with Ising anisotropy in the intersite exchange is studied within the framework of extended dynamical mean-field theory. Nonperturbative numerical solutions at zero temperature point to a continuous transition for both two- and three-dimensional magnetism. In the former case, the transition is associated with critical local physics, characterized by a vanishing Kondo scale and by an anomalous exponent in the dynamics close in value to that measured in heavy-fermion CeCu_{5.9}Au_{0.1}.

4 pages, 3 figures. Version published in Phys. Rev. Lett

References in corpus (3)

• Kondo physics and dissipation: A numerical renormalization-group approach to Bose-Fermi Kondo models
• Zero-Temperature Magnetic Transition in an Easy-Axis Kondo Lattice Model
• Magnetic Quantum Phase Transitions in Kondo Lattices

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• Non-Fermi liquid behavior and quantum criticality in cubic heavy fermion systems with non-Kramers multipolar local moments
• Impurity resonant state in d-wave superconductors: in favor of a Kondo-like response
• Cluster Extended Dynamical Mean Field Approach and Unconventional Superconductivity
• Quasiparticle Band Structure and Spin Excitation Spectrum of the Kondo Lattice
• Magnetic Field Dependence of the Spin Fluctuations in CeCu${}_{5.8}$Ag${}_{0.2}$