J. Phys. I France 2 (1992) 523-528
Fluctuating conductivity above the charge density wave transition in K 0.3MoO 3L. Degiorgi and G. Grüner
Department of Physics and Solid State Science Center, University of California at Los Angeles, Los Angeles CA 90024, U.S.A.
(Received 5 February 1992, accepted 28 February 1992)
We have measured the optical conductivity of K 0.3MoO 3 both above and below the charge density wave transition. We find clear evidence for a collective mode contribution to the optical conductivity and for a gradual opening of a pseudogap at temperatures above the charge density wave transition, but below the mean field transition temperature. We also discuss the parameters which characterize the electrodynamic response in the fluctuation regime.
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