Rung-singlet charge-ordering in alpha'-NaV2O5
Strongly Correlated Electrons
2007-05-23 v1
Abstract
We show that the proposed zig--zag charge--ordering model for alpha'--NaV2O5 is incompatible with a single transition that induces both charge--ordering and spin gap. We introduce a two--band model for alpha'--NaV2O5 within which the simultaneous charge--spin order transition is driven principally by electron-phonon interactions. The spin gap is due to the formation of local dimers, thus explaining the weak magnetic effect on this transition.
Keywords
Cite
@article{arxiv.cond-mat/0305479,
title = {Rung-singlet charge-ordering in alpha'-NaV2O5},
author = {R. T. Clay and S. Mazumdar},
journal= {arXiv preprint arXiv:cond-mat/0305479},
year = {2007}
}
Comments
5 pages, 3 EPS figures