Lattice-Spin Mechanism in Colossal Magnetoresistant Manganites
Materials Science
2007-05-23 v2 Statistical Mechanics
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, that coincides with the Paramagnetic-Ferromagnetic phase transition. The insulating state is due to the self-trapping of every carrier within an oxygen octahedron distortion.
Keywords
Cite
@article{arxiv.cond-mat/0109127,
title = {Lattice-Spin Mechanism in Colossal Magnetoresistant Manganites},
author = {J. A. Verges and V. Martin-Mayor and L. Brey},
journal= {arXiv preprint arXiv:cond-mat/0109127},
year = {2007}
}
Comments
4 pages, 5 figures, ReVTeX macro, accepted for publication in PRL