Non-Fermi-liquid behavior in nearly ferromagnetic SrIrO$_{3}$ single crystals

ORAL

Abstract

We report magnetic, electric transport, and calorimetric properties of single-crystal SrIrO$_{3}$ as a function of temperature $T$ and applied magnetic field $H$. We find that SrIrO$_{3 }$is a non-Fermi-liquid metal near a ferromagnetic instability, as characterized by the following properties: (1) small saturation moment and no evidence for long-range order down to 1.7 K, (2) strongly enhanced magnetic susceptibility that diverges as $T^{\gamma }$ at low temperatures with 1/2$<\gamma <$1, depending on the applied field, (3) heat capacity $C(T$,$H)\sim \quad -T $ln $T $that is readily enhanced in low applied fields, and (4) $T^{3/2}$ dependence of electrical resistivity over the range 1.7 K$

*This work was supported by NSF through grant DMR-0552267

Authors

  • T.F. Qi

    • Univ. of Kentucky
    • University of Kentucky
  • S. Chikara

    • University of Kentucky
  • O.B. Korneta

    • University of Kentucky
  • S. Parkin

    • University of Kentucky
  • L.E. De Long

    • University of Kentucky
  • G. Cao

    • University of Kentucky
  • P. Schlottmann

    • Florida State University