Magnetic quantum phase transition in an anisotropic kondo lattice.
The quantum phase transition between paramagnetic and antiferromagnetic phases of the Kondo lattice model with Ising anisotropy in the intersite exchange is studied within 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 CeCu5.9Au0.1.
Glossop
Matthew T
MT
Department of Physics, University of Florida, Gainesville, Florida 32611-8440, USA.
Ingersent
Kevin
K