We have explored spin, charge and orbitally ordered states in La1-xSrxMnO3 (0 < x < 1/2) using model Hartree-Fock calculations on d-p-type lattice models. At x=1/8, several charge and orbitally modulated states are found to be stable and almost degenerate in energy with a homogeneous ferromagnetic state. The present calculation indicates that a ferromagnetic state with a charge modulation along the c-axis which is consistent with the experiment by Yamada et al. might be responsible for the anomalous behavior around x = 1/8.
@article{arxiv.cond-mat/9912021,
title = {Charge and orbital ordering in underdoped La1-xSrxMnO3},
author = {T. Mizokawa and D. I. Khomskii and G. A. Sawatzky},
journal= {arXiv preprint arXiv:cond-mat/9912021},
year = {2009}
}