Manipulation of magnetic exchange in iridate heterostructures

ORAL

Abstract

Artificial layering of disparate materials into superlattices is an emerging method that promises unparalleled versatility in accessing ground states unavailable to bulk synthesis. Heterostructures composed of paramagnetic, metallic SrIrO$_3$ interspaced with band insulating SrTiO$_3$ were found to host a canted antiferromagnetic ground state, mirroring the Ruddlesen-Popper series iridates with enhanced tunability. We investigate the magnetic excitation spectrum of these artificial systems using resonant inelastic x-ray scattering and directly infer the interlayer and intralayer magnetic exchange interactions. Understanding how interfacial effects modify magnetic interactions is a vital prerequisite for efforts to controllably target different ground states within complex oxide-heterostructures.

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Authors

  • D. Meyers

    Brookhaven National Laboratory, Brookhaven National Lab, Brookhaven Natl Lab

  • Gilberto Fabbris

    Brookhaven National Laboratory, Brookhaven Natl Lab

  • Weiguo Yin

    Brookhaven National Laboratory, Brookhaven National Laboratory, Upton, NY 11973, USA

  • D. Casa

    Argonne National Laboratory

  • Yue Cao

    Brookhaven National Laboratory, Brookhaven National Lab, Univ of Colorado - Boulder

  • Lin Hao

    University of Tennessee, Univ of Tennessee, Knoxville

  • Thorsten Schmitt

    Paul Scherrer Institut, Swiss Light Source, Paul Scherrer Institut, Villigen, Switzerland

  • Jian Liu

    Department of Physics and Astronomy, University of Tennessee, University of Tennessee, Univ of Tennessee, Knoxville

  • M Dean

    Brookhaven National Laboratory, Brookhaven National Lab, Brookhaven Natl Lab