Jahn-Teller, Charge and Magnetic Ordering in half-doped Manganese Oxides
Strongly Correlated Electrons
2009-10-31 v1
Abstract
The phase diagram of half-doped manganite systems of formula A_{0.5}A'_{0.5}MnO_3 is investigated within a single-orbital model incorporating magnetic double-exchange and superexchange, together with intersite Coulomb and electron-lattice interactions. Strong Jahn-Teller and breathing mode deformations compete together and result in shear lattice deformations. The latters stabilize the charge-ordered CE-type phase, which undergo first-order transitions with temperature or magnetic field to either Ferromagnetic metallic or Paramagnetic insulating phases. An essential feature is the self-consistent screening of Coulomb and electron-phonon interactions in the ferromagnetic phase.
Keywords
Cite
@article{arxiv.cond-mat/0011419,
title = {Jahn-Teller, Charge and Magnetic Ordering in half-doped Manganese Oxides},
author = {S. Fratini and D. Feinberg and M. Grilli},
journal= {arXiv preprint arXiv:cond-mat/0011419},
year = {2009}
}
Comments
10 pages, six figures (eps files) +two class files