Low-frequency crossover of the fractional power-Law conductivity in SrRuO3
We combine the results of terahertz time-domain spectroscopy with far-infrared transmission and reflectivity to obtain the conductivity of SrRuO3 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.
Dodge
JS
Department of Physics, University of California at Berkeley, Berkeley, California 94720 and Materials Sciences Division, E. O. Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Weber
CP
Corson
J
Orenstein
J
Schlesinger
Z
Reiner
JW
Beasley
MR