Charge Ordering and Spin Dynamics in NaV2O5

Details Charge Ordering and Spin Dynamics in NaV2O5 Charge Ordering and Spin Dynamics in NaV2O5

2000-07-03

arxiv.org/abs/cond-mat/0007025v2

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 figures, to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.86.5966

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.

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