Interfacial symmetry control of the chiral magnetism in iridate-manganite superlattices

ORAL

Abstract

Correlated oxides have been extensively studied due to the diverse physical properties arising from strong 3d electron correlations combined with lattice and orbital degrees of freedom. Recently, progress toward the creation of exotic quantum and topological properties has been led by the synthesis of 5d oxides with strong spin-orbit coupling. We will present our recent work examining the physical properties of high-quality epitaxially grown LaMnO3/SrIrO3 superlattices. By creating large inversion symmetry breaking with different A- and B-sites in LaMnO3/SrIrO3, we obtain an “topological” Hall effect (THE) that results from interface-induced chiral magnetism resulting from interfacial Dzyaloshinskii-Moriya interactions (DMI). We explore the role of interface symmetry to drive the emergence of the THE at 3d/5d oxides by altering DMI at single interfaces. Furthermore, we compare the effects of (atomic) interfacial DMI and extended superlattice symmetry which together are responsible for the total effective DMI that drive the THE.

*This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division.

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Presenters

  • Elizabeth Skoropata

    • Oak Ridge National Laboratory
    • Materials Science and Technology Division, Oak Ridge National Laboratory
    • Materials Sciences and Technology Division, Oak Ridge National Laboratory

Authors

  • Elizabeth Skoropata

    • Oak Ridge National Laboratory
    • Materials Science and Technology Division, Oak Ridge National Laboratory
    • Materials Sciences and Technology Division, Oak Ridge National Laboratory

  • John A Nichols

    • Materials Sciences and Technology Division, Oak Ridge National Laboratory

  • Ankur Rastogi

    • Materials Science and Technology Division, Oak Ridge National Laboratory
    • Materials Sciences and Technology Division, Oak Ridge National Laboratory

  • Changhee Sohn

    • Materials Science and Technology Division, Oak Ridge National Laboratory
    • Materials Science and Technology Division, Oak Ridge National Lab
    • Materials Sciences and Technology Division, Oak Ridge National Laboratory
    • Oak Ridge National Laboratory

  • Ryan Desautels

    • Neutron Scattering Division, Oak Ridge National Laboratory
    • Oak Ridge National Laboratory
    • Large Scale Structures Division, Oak Ridge National Laboratory

  • Xiang Gao

    • Materials Science and Technology Division, Oak Ridge National Laboratory
    • Materials Sciences and Technology Division, Oak Ridge National Laboratory

  • Satoshi Okamoto

    • Materials Science and Technology Division, Oak Ridge National Laboratory
    • Oak Ridge National Laboratory
    • Materials Sciences and Technology Division, Oak Ridge National Laboratory
    • Oak Ridge National Lab

  • Matthew Brahlek

    • Materials Sciences and Technology Division, Oak Ridge National Laboratory
    • Materials Science and Technology Division, Oak Ridge National Laboratory

  • Ho Nyung Lee

    • Materials Science and Technology Division, Oak Ridge National Laboratory
    • Materials Sciences and Technology Division, Oak Ridge National Laboratory
    • Oak Ridge National Laboratory