Two relaxation rates in the in-plane THz conductivity of a clean Sr<sub>2</sub>RuO<sub>4</sub> thin film

POSTER

Abstract

Understanding the metallic normal state of Sr2RuO4 could help solve puzzles about its unconventional superconducting state. The normal state of Sr2RuO4 is considered a clean Fermi liquid in the low temperature and low frequency limit. Herein we present time domain THz measurements of the optical conductivity of a highly clean, RRR (residual resistivity ratio) ≈ 53 epitaxial thin film, in which we find deviation from Fermi liquid scaling of a simple metal below 3 meV. The complex conductivity can be modeled with two Drude terms, the decay rate of both of which follows T^2 dependence. We discuss the physical implications of two conducting channels. We compare the results with our experiments on other metallic ruthenates including SrRuO3 and CaRuO3 with similar RRR.

*This work was supported as part of the Institute for Quantum Matter, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award No. DE-SC0019331.

Presenters

  • Youcheng Wang

    • Institute of Quantum Matter, Department of Physics and Astronomy, Johns Hopkins University

Authors

  • Youcheng Wang

    • Institute of Quantum Matter, Department of Physics and Astronomy, Johns Hopkins University

  • Hari Nair

    • Cornell University
    • Department of Materials Science and Engineering, Kavli Institute at Cornell for Nanoscale Science, Cornell University

  • Nathaniel Schreiber

    • Cornell University
    • Department of Materials Science and Engineering, Cornell University
    • Department of Materials Science and Engineering, Kavli Institute at Cornell for Nanoscale Science, Cornell University

  • Jacob Ruf

    • Cornell University
    • Laboratory of Atomic and Solid State Physics, Department of Physics, Kavli Institute at Cornell for Nanoscale Science, Cornell University

  • Ludi Miao

    • Cornell University
    • Laboratory of Atomic and Solid State Physics, Department of Physics, Kavli Institute at Cornell for Nanoscale Science, Cornell University
    • Laboratory of Atomic and Solid State Physics, Cornell University

  • Darrell Schlom

    • Cornell University
    • Department of Materials Science and Engineering, Cornell University
    • Department of Materials Science and Engineering, Kavli Institute at Cornell for Nanoscale Science, Cornell University
    • Materials Science and Engineering, Cornell University
    • Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853, USA
    • Platform for the Accelerated Realization, Analysis, & Discovery of Interface Materials (PARADIM), Cornell University

  • Kyle M Shen

    • Cornell University
    • Department of Physics, Cornell University, Cornell University
    • Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University
    • Laboratory of Atomic and Solid State Physics, Department of Physics, Kavli Institute at Cornell for Nanoscale Science, Cornell University

  • Peter Armitage

    • Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218
    • Johns Hopkins University
    • Institute of Quantum Matter, Department of Physics and Astronomy, Johns Hopkins University