title: Lattice-spin mechanism in colossal magnetoresistive manganites.
abstract: We present a single-orbital double-exchange model, coupled with cooperative phonons (the so called breathing modes of the oxygen octahedra in manganites). The model is studied with Monte Carlo simulations. For a finite range of doping and coupling constants, a first-order metal-insulator phase transition is found, which coincides with the paramagnetic-ferromagnetic phase transition. The insulating state is due to the self-trapping of every carrier within an oxygen octahedron distortion.
authors.affiliation: Instituto de Ciencia de Materiales (CSIC), Cantoblanco, 28049 Madrid, Spain.
authors.forename: J A
authors.initials: JA
authors.lastname: Vergés
authors.forename: V
authors.initials: V
authors.lastname: Martín-Mayor
authors.forename: L
authors.initials: L
authors.lastname: Brey