Charge ordering signatures in the optical properties of beta-Na0.33V2O5

Abstract

Temperature dependent optical spectra are reported for beta-Na0.33V2O5. The sodium ordering transition at T_Na = 240 K, and in particular the charge ordering transition at T_MI = 136 K strongly influence the optical spectra. The metal-insulator transition at \tmi leads to the opening of a psuedogap (\hbarω= 1700 cm-1), and to the appearance of a large number of optical phonons. These observations, and the presence of a mid-infrared band (typical for low dimensional metals) strongly suggests that the charge carriers in beta-Na0.33V2O5 are small polarons.

arXiv commentTo be published in PRL

References in corpus (1)

• The magnetic ordering in the mixed valence compound beta-Na0.33V2O5

Cited by in corpus (8)

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• Pressure-induced changes in the optical properties of quasi-one-dimensional $\beta$-Na${}_{0.33}$V${}_2$O${}_5$
• Electronic and vibrational properties of low-dimensional perovskites Sr${}_{1-y}$La${}_y$NbO${}_{3.5-x}$
• Correlation of optical conductivity and ARPES spectra of strong-coupling large polarons and its display in cuprates
• Signatures of polaronic charge ordering in optical and dc conductivity using dynamical mean field theory
• Investigation of lattice dynamics, magnetism and electronic transport in $\beta$-Na${}_{0.33}$V${}_2$O${}_5$