Magnetic quantum phase transition in an anisotropic Kondo lattice

Details Magnetic quantum phase transition in an anisotropic Kondo lattice Magnetic quantum phase transition in an anisotropic Kondo lattice

2006-07-21

arxiv.org/abs/cond-mat/0607566v3

Phys. Rev. Lett. 99, 227203 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

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

Scientific paper

10.1103/PhysRevLett.99.227203

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}.

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