Non-Fermi-liquid behavior of SrRuO 3: evidence from infrared conductivity

P Kostic, Y Okada, NC Collins, Z Schlesinger, JW Reiner, L. Klein, A Kapitulnik, TH Geballe, MR Beasley

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The reflectivity of the itinerant ferromagnet SrRuO3 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 1/ω1/2), 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 SrRuO3 are substantially different from those of Fermi-liquid metals.
Original languageAmerican English
JournalPhysical Review Letters
Issue number12
StatePublished - 1998


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