Scaling properties of the optical conductivity of Bi-based cuprates

Details Scaling properties of the optical conductivity of Bi-based cuprates Scaling properties of the optical conductivity of Bi-based cuprates

2006-04-03

arxiv.org/abs/cond-mat/0604037v1

Annals of Physics 321, 1716--1729 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

17 pages, 10 figures, elsart

Scientific paper

10.1016/j.aop.2006.04.012

We present novel infrared optical conductivity data on the three layer high Tc superconductor Bi2Sr2Ca2Cu3O10 at optimal doping. We extend the analysis of an earlier publication, providing a universal scaling function sigma(omega,T)=g(omega/T)/T for the optical conductivity. In the present manuscript we obtain a good scaling collapse of the experimental curves on the g(omega/T) over a wide range of values of omega/T (at least in range 0 to 10), if we assume that g(omega/T) is superimposed on a non-universal background which is temperature independent. We obtain the same result, if in our analysis we allow this background to have a T-squared temperature dependent correction. The most striking property of g(omega/T) is, that it corresponds to a scattering rate which varies linearly as a function of temperature, but which is independent of the frequency.

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