Role of dimensionality in SrIrO<sub>3</sub>/BaTiO<sub>3</sub> superlattices

ORAL

Abstract

Ultrathin film SrIrO3 is unique among transition metal oxides because it has been shown to have strong spin-orbit coupling and electron-electron (e-e) correlations. Previous studies have found that a ferromagnetic and insulating phase in the SrIrO3/SrTiO3 superlattice appears when the SrIrO3 layer thickness is below 3 unit cells, which is attributed to enhanced e-e correlation as is expected for a system with reduced dimensionality. However, as we present here, the superlattice of SrIrO3/BaTiO3 does not show any thickness-driven MIT or ferromagnetism even in the single SrIrO3 unit cell superstructure. Our results demonstrate that other variables in addition to the enhanced e-e correlations, such as lattice structure effects, are crucial for the realization of magnetism and MIT’s in SrIrO3 systems.

*Supported by the US Department of Energy (DOE) under Grant No. DOE DE-SC0002136.

–

Presenters

  • David Howe

    • Louisiana State Univ - Baton Rouge

Authors

  • David Howe

    • Louisiana State Univ - Baton Rouge

  • Mohammad Saghayezhian

    • Louisiana State Univ - Baton Rouge
    • Department of Physics, Louisiana State University
    • Department of Physics & Astronomy, Louisiana State University
    • Physics and Astronomy, Louisiana State University

  • Hangwen Guo

    • Louisiana State Univ - Baton Rouge
    • Department of Physics, Louisiana State University
    • Dept. of Physics and Astronomy , Louisiana State University, USA
    • Department of Physics & Astronomy, Louisiana State University
    • Louisiana State University
    • Department of Physics and Astronomy, Louisiana State University

  • Zhen Wang

    • Department of Physcis and Astronomy, Louisiana State University
    • Louisiana State University
    • Louisiana State Univ - Baton Rouge
    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory
    • Department of Physics and Astronomy, Louisiana State University

  • Yimei Zhu

    • Condensed Matter Physcis and Materials Science Departement, Brookhaven National Laboratory
    • Brookhaven National Laboratory
    • Condensed Matter Physics & Materials Science, Brookhaven National Laboratory
    • Brookhaven Natl Lab
    • Brookhaven National Lab
    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory
    • Department of Condensed Matter Physics and Materials Science, Brookhaven National Laboratory
    • Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory

  • E Plummer

    • Physics and Astronomy, Louisiana State Univ - Baton Rouge
    • Department of Physcis and Astronomy, Louisiana State University
    • Louisiana State Univ - Baton Rouge
    • Department of Physics, Louisiana State University
    • Dept. of Physics and Astronomy , Louisiana State University, USA
    • Department of Physics & Astronomy, Louisiana State University
    • Department of Physics and Astronomy, Louisiana State University

  • Jiandi Zhang

    • Department of Physcis and Astronomy, Louisiana State University
    • Louisiana State Univ - Baton Rouge
    • Department of Physics, Louisiana State University
    • Physics and Astronomy, Louisiana State University
    • Department of Physics and Astronomy, Louisiana State University