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

Abstract

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 ω^{-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.

4 pages, 3 postscript figures

References in corpus (2)

• Transport Properties, Thermodynamic Properties, and Electronic Structure of SrRuO3
• Electronic structure and magnetism in Ru based perovskites

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