Charge Ordering and Spin gap in NaV_2O_5
arXiv:cond-mat/9805185 · doi:10.1016/S0022-3697(99)00056-6
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.
3 pages, 4 figures, submitted to J. Phys. Soc. Jpn
References in corpus (6)
- NaV_2O_5 as a quarter-filled ladder compound
- A new view of the electronic structure of the spin-Peierls compound alpha'-NaV2O5
- Charge ordering and spin- Peierls transition in alpha'-NaV2O5
- Magnon splitting induced by charge ordering in NaV_2O_5
- Dynamical properties of the spin-Peierls compound α'--NaV2O5
- Critical Dimerization Strength of the Quarter-Filled t-J Model