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We present the measurements of the polarized optical spectra of NaV2O5 andLiV2O5. In an energy range from 0.5 to 5.5 eV we observe similar peaks in the Eparallel a spectra of LiV2O5 and NaV2O5, which suggests similar electronicstructure along the a axis in both materials. On the other hand, we find analmost complete suppression of the peaks in sigma_b of LiV2O5 around 1 and 5eV. We attribute this suppression to the charge localization originating fromthe existence of double-chain charge-ordering patterin in LiV2O5.Comment: 7 pages, 3 figures final version, to appear in PR

physical review. b, condensed matter

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Charge ordering and optical transitions ofLiV2O5and<…