Charge Ordering and Spin gap in NaV_2O_5
Strongly Correlated Electrons
2009-10-31 v1
Abstract
A possible ground state of NaV_2O_5 is proposed based on the Hartree approximation for both on-site and intersite Coulomb interactions. The results indicate that the intersite Coulomb interaction induces a zigzag type of charge disproportionation (i.e. charge ordering) along the ladders of V-ions resulting in the localized spins between neighboring ladders to form a spin gap. This new state, which is different from the spin-Peierls state so far believed, seems to be consistent with the existing experimental results.
Keywords
Cite
@article{arxiv.cond-mat/9805185,
title = {Charge Ordering and Spin gap in NaV_2O_5},
author = {Hitoshi Seo and Hidetoshi Fukuyama},
journal= {arXiv preprint arXiv:cond-mat/9805185},
year = {2009}
}
Comments
3 pages, 4 figures, submitted to J. Phys. Soc. Jpn