Role of dimensionality in SrIrO3/BaTiO3 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.

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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