We propose a microscopic physical mechanism that stabilizes the 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 of parameters, and discuss transitions between different phases. Our results may be used to guide future experiments on heavy fermion compounds. © 2013 American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Isaev, L., & Vekhter, I. (2013). Heavy antiferromagnetic phases in kondo lattices. Physical Review Letters, 110 (2) https://doi.org/10.1103/PhysRevLett.110.026403