title: Heavy antiferromagnetic phases in Kondo lattices.
abstract: 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.
authors: Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 80703, USA.
authors: L
authors: L
authors: Isaev
authors: I
authors: I
authors: Vekhter