Charge and sodium ordering in beta-Na_0.33V_2O_5

Abstract

Polarized Raman and optical spectra for the quasi one-dimensional metallic vanadate beta-Na0.33V2O3 are reported for various temperatures. The spectra are discussed in the light of the sodium and charge ordering transitions occurring in this material, and demonstrate the presence of strong electron phonon coupling.

To be published in J. Superconductivity: Incorporating Novel Magnetism (december 2002)