Heavy antiferromagnetic phases in Kondo lattices

Abstract

We propose a microscopic physical mechanism that stabilizes coexistence of the Kondo effect and antiferromagnetism in heavy-fermion systems. We consider a two-dimensional quantum Kondo-Heisenberg lattice model and show that long-range electron hopping leads to a robust antiferromagnetic Kondo state. By using a modified slave-boson mean-field approach we analyze the stability of the heavy antiferromagnetic phase across a range or parameters, and discuss transitions between different phases. We also address connection to experiments on heavy fermion compounds.

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• Phase evolution of the two-dimensional Kondo lattice model near half-filling
• Modulated Spin Liquid and Magnetic Order from a Kondo-Heisenberg model applied to $UR{u}_{2}S{i}_2$
• Phase diagram of Kondo-Heisenberg model on honeycomb lattice with geometrical frustration
• Fermionology in the Kondo-Heisenberg model: the case of CeCoIn${}_5$
• Two-band model and RVB-type states: application to Kondo lattices, pyrochlores and Mn-based systems
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• Magnetism, non-Fermi-liquid behavior and deconfinement in Kondo lattices