Charge ordering and long-range interactions in layered transition metal oxides
Condensed Matter
2009-10-31 v1
Abstract
We study the competition between long-range and short-range interactions among holes within the spin density wave picture of layered transition metal oxides. We focus on the problem of charge ordering and the charge phase diagram. We show that the main interactions are the long-range Coulomb interaction and a dipolar short-range interaction generated by the short-range antiferromagnetic fluctuations. We find four different phases depending on the strength of the dipolar interaction and the density of holes: Wigner crystal, diagonal stripes, horizontal-vertical stripes (loops) and a glassy-clumped phase. We discuss the effect of temperature, disorder and lattice effects on these phases.
Keywords
Cite
@article{arxiv.cond-mat/9805367,
title = {Charge ordering and long-range interactions in layered transition metal oxides},
author = {Branko P. Stojkovic and Z. G. Yu and A. R. Bishop and A. H. Castro Neto and Niels Gronbech-Jensen},
journal= {arXiv preprint arXiv:cond-mat/9805367},
year = {2009}
}
Comments
REVTEX, 2 PS figures, uses epsf.sty