Capturing the hidden symmetry in layered iridate heterostructures

ORAL

Abstract

Layered iridates hosting square lattices have recently gained plenty of interests with potential of unconventional superconductivity leading the charge. The large spin-orbit coupling of the Ir pseudospin half state, on the other hand, may enable a hidden SU(2) symmetry much stronger than that in cuprates. Probing and unveiling this symmetry is however highly challenging and hindered in the bulk material, because of the non-trivial interlayer coupling. Through accurately tailoring the magnetic structure, we exploited this symmetry in heterostructures as composed of perovskite SrIrO3 and SrTiO3. Upon approaching the 2D limit, the hidden symmetry triggers large magnetic fluctuations and enables an unprecedented strong coupling between the antiferromagnetic order and external magnetic field. The capability of materializing the hidden symmetry in artificial structures provides a fruitful playground for pursuing novel phenomena beyond the cuprate physics.

*J.L. acknowledges the support by the start-up fund and the Transdisciplinary Academy Program at the University of Tennessee. J.L. acknowledges the support by the Organized Research Unit Program at the University of Tennessee and the support by the DOD-DARPA under Grant No. HR0011-16-1-0005.

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Presenters

  • Dominik Kriegner

    • Charles University
    • Academy of Sciences of the Czech Republic

Authors

  • Lin Hao

    • Univ of Tennessee, Knoxville
    • University of Tennessee

  • Derek Meyers

    • Brookhaven National Laboratory
    • Condensed Matter Physics and Materials Science, Brookhaven National Laboratory
    • Brookhaven Natl Lab

  • Hidemaro Suwa

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

  • Junyi Yang

    • Univ of Tennessee, Knoxville

  • Clayton Frederick

    • Univ of Tennessee, Knoxville
    • University of Tennessee

  • Tamene Dasa

    • Univ of Tennessee, Knoxville

  • Gilberto Fabbris

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

  • Lukas Horak

    • Charles University

  • Dominik Kriegner

    • Charles University
    • Academy of Sciences of the Czech Republic

  • Yongseong Choi

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

  • Jong Woo Kim

    • Argonne National Laboratory
    • The Advanced Photon Source, Argonne National Laboratory
    • Advanced Photon Source, Argonne National Laboratory
    • Argonne National Labs

  • Daniel Haskel

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

  • Philip Ryan

    • Argonne National Laboratory
    • Argonne National Labs

  • Haixuan Xu

    • Univ of Tennessee, Knoxville
    • University of Tennessee

  • Cristian Batista

    • Department of Physics and Astronomy, Univ of Tennessee, Knoxville
    • Univ of Tennessee, Knoxville
    • Department of Physics and Astronomy, The University of Tennessee
    • University of Tennessee
    • Physics, University of Tennessee
    • The University of Tennessee
    • Department of Phys., Univ. of Tennessee
    • U. Tennessee, Knoxville
    • University of Tennessee, Knoxville

  • Mark Dean

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

  • Jian Liu

    • Department of Physics and Astronomy, The University of Tennessee
    • Univ of Tennessee, Knoxville
    • University of Tennessee
    • University of Tennessee-Knoxville