Metal-insulator transition in the double perovskites
Strongly Correlated Electrons
2009-11-07 v1
Abstract
We construct an effective Hamiltonian for the motion of electrons among the transition metal ions of ordered double perovskites like Sr2FeMoO6. in which strong intra-atomic Coulomb repulsion U is present in only one of the inequivalent transition metal sites. Using a slave-boson formalism, we construct a phase diagram which describes a charge transfer transition between insulating and metallic behavior as the parameters of the model are changed. The parameters for Sr2FeMoO6 are estimated from first-principles calculations and a transition to the insulating state with negative pressure is obtained.
Keywords
Cite
@article{arxiv.cond-mat/0105566,
title = {Metal-insulator transition in the double perovskites},
author = {A. A. Aligia and P. Petrone and J. O. Sofo and B. Alascio},
journal= {arXiv preprint arXiv:cond-mat/0105566},
year = {2009}
}
Comments
5 pages, 3 figures, submitted to Phys. Rev. B