Two Dimensional Ordering and Fluctuations in α'-NaV2O5
Abstract
X-ray diffraction measurements of Bragg and diffuse scattering associated with charge ordering in the inorganic compound α'- NaV2O5 show a continuous phase transition at a temperature of about 33.1 K. Many of this material's properties suggest a spin-Peierls transition, as established in CuGeO3 and MEM\(TCNQ\)2. We compare the order parameter as well as fluctuations in the order parameter in these materials, and conclude that α'- NaV2O5 is dissimilar, and that the transition is two dimensional in nature, due to charge ordering associated with the fractional average valence at the vanadium site within the orthorhombic a- b plane.
- Publication:
-
Physical Review Letters
- Pub Date:
- April 2000
- DOI:
- 10.1103/PhysRevLett.84.3446
- Bibcode:
- 2000PhRvL..84.3446G