Infrared properties of W-doped charge-density-wave material K$_{0.3}$MoO$_3$

Details Infrared properties of W-doped charge-density-wave material K$_{0.3}$MoO$_3$ Infrared properties of W-doped charge-density-wave material K$_{0.3}$MoO$_3$

2002-11-12

arxiv.org/abs/cond-mat/0211225v1

Physics

Condensed Matter

Strongly Correlated Electrons

2 pages, 2 figures, to be published in the proceedings of LT23

Scientific paper

10.1016/S0921-4526(02)02150-6

The optical conductivity spectra of quasi-one dimensional compounds K$_{0.3}$Mo$_{1-x}$W$_x$O$_3$ (x=0, 0.03 and 0.15) have been studied over broad frequencies. While the dc resistivity measurements indicate no sign of CDW transition in heavily W-doped blue bronze, the optical conductivity spectra still show a single particle gap at around 0.2 eV for \textbf{E} parallel to the chain direction. Such impurity effect challenges our understanding about the occurrence of the optical gap with the CDW transition.

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