Charge Ordering and Spin Dynamics in NaV2O5
Strongly Correlated Electrons
2009-10-31 v2
Abstract
We report high-resolution neutron inelastic scattering experiments on the spin excitations of NaV2O5. Below Tc, two branches associated with distinct energy gaps are identified. From the dispersion and intensity of the spin excitation modes, we deduce the precise zig-zag charge distribution on the ladder rungs and the corresponding charge order (about 0.6). We argue that the spin gaps observed in the low-T phase of this compound are primarily due to the charge transfer.
Cite
@article{arxiv.cond-mat/0007025,
title = {Charge Ordering and Spin Dynamics in NaV2O5},
author = {B. Grenier and O. Cepas and L. P. Regnault and J. E. Lorenzo and T. Ziman and J. P. Boucher and A. Hiess and T. Chatterji and J. Jegoudez and A. Revcolevschi},
journal= {arXiv preprint arXiv:cond-mat/0007025},
year = {2009}
}
Comments
4 pages, 5 figures, to appear in Phys. Rev. Lett