Metal-insulator transition in the double perovskites

A. A. Aligia, P. Petrone, J. O. Sofo, B. Alascio

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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 that 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.

Original languageEnglish (US)
Article number092414
Pages (from-to)924141-924144
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume64
Issue number9
DOIs
StatePublished - Sep 1 2001

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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