1210.0573 (L. Isaev et al.)

Heavy antiferromagnetic phases in Kondo lattices    [PDF]

L. Isaev, I. Vekhter

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.

View original: http://arxiv.org/abs/1210.0573