Fractional power-law conductivity in SrRuO_3 and its consequences
arXiv:cond-mat/0006271
Abstract
We combine the results of terahertz time-domain spectroscopy with far-infrared transmission and reflectivity to obtain the conductivity of SrRuO_3 over an unprecedented continuous range in frequency, allowing us to characterize the approach to zero frequency as a function of temperature. We show that the conductivity follows a simple phenomenological form, with an analytic structure fundamentally different from that predicted by the standard theory of metals.
4 pages, 3 figures, revtex4b4