Non-Fermi liquid behavior of SrRuO_3 -- evidence from infrared conductivity

Details Non-Fermi liquid behavior of SrRuO_3 -- evidence from infrared conductivity Non-Fermi liquid behavior of SrRuO_3 -- evidence from infrared conductivity

1998-04-03

arxiv.org/abs/cond-mat/9804041v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 postscript figures

Scientific paper

10.1103/PhysRevLett.81.2498

The reflectivity of the itinerant ferromagnet SrRuO_3 has been measured between 50 and 25,000 cm-1 at temperatures ranging from 40 to 300 K, and used to obtain conductivity, scattering rate, and effective mass as a function of frequency and temperature. We find that at low temperatures the conductivity falls unusually slowly as a function of frequency (proportional to \omega^{-1/2}), and at high temperatures it even appears to increase as a function of frequency in the far-infrared limit. The data suggest that the charge dynamics of SrRuO_3 are substantially different from those of Fermi-liquid metals.

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