Electro-Reflectance Spectra of Blue Bronze

Details Electro-Reflectance Spectra of Blue Bronze Electro-Reflectance Spectra of Blue Bronze

2003-07-03

arxiv.org/abs/cond-mat/0307075v2

Physics

Condensed Matter

1)submitted to Eur. Phys. J B 2) revised (July 24) to a) better emphasize results and b) with new figure insets to make paper

Scientific paper

10.1140/epjb/e2003-00273-5

We show that the infrared reflectance of the quasi-one dimensional charge-density-wave (CDW) conductor K0.3MoO3 (blue bronze) varies with position when a voltage greater than the CDW depinning threshold is applied. The spatial dependence and spectra associated with these changes are generally as expected from the electro-transmission [B.M. Emerling, et al, Eur. Phys. J. B 16, 295 (2000)], but there are some differences which might be associated with changes in the CDW properties on the surface. We have examined the electro-reflectance spectrum associated with CDW current investigation for light polarized parallel to the conducting chains for signs of expected current-induced intragap states, and conclude that the density of any such states is at least an order of magnitude lower than expected.

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