Non-Fermi-Liquid Behavior of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="normal">SrRuO</mi><mrow><msub><mrow><mi></mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span>: Evidence from Infrared Conductivity

P. Kostic; Y. Okada; N. C. Collins; Z. Schlesinger; J. W. Reiner; L. Klein; A. Kapitulnik; T. H. Geballe; M. R. Beasley

doi:10.1103/PhysRevLett.81.2498

Non-Fermi-Liquid Behavior of $SrRuO_{3}$ : Evidence from Infrared Conductivity

P. Kostic, Y. Okada, N. C. Collins, Z. Schlesinger, J. W. Reiner, L. Klein, A. Kapitulnik, T. H. Geballe, and M. R. Beasley

Phys. Rev. Lett. 81, 2498 – Published 21 September 1998

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 $1 / ω^{1 / 2}$ ), 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.

Received 13 March 1998

DOI:https://doi.org/10.1103/PhysRevLett.81.2498

Authors & Affiliations

P. Kostic, Y. Okada^*, N. C. Collins, and Z. Schlesinger

Department of Physics, University of California, Santa Cruz, California 95064

J. W. Reiner, L. Klein^†, A. Kapitulnik, T. H. Geballe, and M. R. Beasley

Edward L. Ginzton Laboratories, Stanford University, Stanford, California 94305

^*Permanent address: Ministry of International Trade and Industry, Japanese Patent Office, Tokyo 100, Japan.
^†Permanent address: Bar-Ilan University, Department ofPhysics, Ramat-Gan 52900, Israel.