Zero-Temperature Magnetic Transition in an Easy-Axis Kondo Lattice Model

Abstract

We address the quantum transition of a spin-1/2 antiferromagnetic Kondo lattice model with an easy-axis anisotropy using the extended dynamical mean field theory. We derive results in real frequency using the bosonic numerical renormalization group (bNRG) method and compare them with Quantum Monte Carlo results in Matsubara frequency. The bNRG results show a logarithmic divergence in the critical local spin susceptibility, signaling a destruction of Kondo screening. The T=0 transition is consistent with being second order. The bNRG results also display some subtle features; we identify their origin and suggest means for further microscopic studies.

4 pages, 3 embedded eps figures. Published version

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Cited by in corpus (5)

• The numerical renormalization group method for quantum impurity systems
• Quantum Criticality in Heavy Fermion Metals
• Cellular Dynamical Mean Field Theory of the Periodic Anderson Model
• Magnetic quantum phase transition in an anisotropic Kondo lattice
• Impurity resonant state in d-wave superconductors: in favor of a Kondo-like response