Synthesis and electronic properties of Ruddlesden-Popper strontium iridate epitaxial thin films stabilized by kinetic control

ORAL

Abstract

We report on the selective fabrication of high-quality Sr2IrO4 and SrIrO3 epitaxial thin films from a single Sr2IrO4 target by pulsed laser deposition. We discover that within a relatively narrow range of substrate temperature, the oxygen partial pressure plays a critical role in the cation stoichiometric ratio of the films and triggers the stablization of different Ruddlesden-Popper (RP) phases. Resonnant X-ray abosprtion spectra taken at Ir L-edge and O K-edge demonstrate the presence of strong spin-orbit coupling, and reveal the electronic and orbital structures of both compounds. These results offer a new approach to the synthesis of ultra-thin films of RP series of iridates and can be extended to other compelx oxides with layered structure.

*We acknowledge the Gordon and Betty Moore Foundation’s EPiQS Initiative through Grant GBMF4534, and the Department of Energy under grant DE-SC0012375. This research used resources of the Advanced Light Source, which is a Department of Energy Office of Science User Facility under Contract No. DEAC0205CH11

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Presenters

  • Xiaoran Liu

    • Rutgers University
    • Department of Physics & Astronomy, Rutgers the State Univ of NJ New Brunswick

Authors

  • Xiaoran Liu

    • Rutgers University
    • Department of Physics & Astronomy, Rutgers the State Univ of NJ New Brunswick

  • Yanwei Cao

    • Rutgers University
    • Department of Physics & Astronomy, Rutgers the State Univ of NJ New Brunswick
    • Department of Physics, Ningbo Institute of Materials Technology and Engineering

  • Banabir Pal

    • Department of Physics & Astronomy, Rutgers the State Univ of NJ New Brunswick
    • Department of Physics, Rutgers Univ
    • Physics and Astronomy, Rutgers University

  • Mikhail Kareev

    • Department of Physics & Astronomy, Rutgers the State Univ of NJ New Brunswick

  • Srimanta Middey

    • Department of Physics, Indian Institute of Science

  • Yongseong Choi

    • Argonne National Laboratory
    • Argonne Natl Lab
    • Advanced Photon Source, Argonne National Laboratory
    • Argonne National Lab
    • Advanced Photon Sources , Argonne National Laboratory

  • Padraic Shafer

    • Lawrence Berkeley National Laboratory
    • Advanced Light Source, Lawrence Berkeley National Laboratory
    • Advanced Light Source

  • Daniel Haskel

    • Advanced Photon Source, Argonne National Laboratory
    • Argonne National Laboratory
    • Argonne Natl Lab
    • Argonne Natl Labs

  • Elke Arenholz

    • Lawrence Berkeley National Laboratory
    • Advanced Light Source, Lawrence Berkeley National Laboratory
    • Advance Light Source, Lawrence Berkeley National Laboratory
    • Advanced Light Source

  • Jak Chakhalian

    • Rutgers University
    • Department of Physics & Astronomy, Rutgers the State Univ of NJ New Brunswick
    • Department of Physics, Rutgers Univ
    • Physics and Astronomy, Rutgers University