Giant magnetic response in layered antiferromagnetic 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 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 [1]. Upon approaching the 2D limit, the hidden symmetry triggers large magnetic fluctuations and enables an unprecedentedly strong coupling between the antiferromagnetic order and external magnetic field [2]. The ability of materializing the hidden symmetry in artificial structures provides a fruitful playground for pursuing novel phenomena beyond the cuprate physics.

[1] L. Hao, et.al, Phys. Rev. Lett. 119, 027204 (2017). [2] L. Hao, et.al, Nat. Phys. 14, 806–810 (2018).

*J.L. acknowledges support by the Organized Research Unit Program at the University of Tennessee and support by the DOD-DARPA under grant no. HR0011-16-1-0005.

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Presenters

  • Lin Hao

    • University of Tennessee
    • Univ of Tennessee, Knoxville

Authors

  • Lin Hao

    • University of Tennessee
    • Univ of Tennessee, Knoxville

  • Derek Meyers

    • Brookhaven National Laboratory

  • Hidemaro Suwa

    • University of Tennessee

  • Junyi Yang

    • University of Tennessee
    • Univ of Tennessee, Knoxville

  • Clayton Frederick

    • University of Tennessee

  • Tamene Dasa

    • University of Tennessee

  • Gilberto Fabbris

    • Brookhaven National Laboratory

  • Lukas Horak

    • Charles University

  • Dominik Kriegner

    • Charles University

  • Yongseong Choi

    • Argonne National Laboratory

  • Jong-Woo Kim

    • Argonne National Laboratory

  • Daniel Haskel

    • Argonne National Laboratory

  • Philip Ryan

    • Argonne National Laboratory

  • Haixuan Xu

    • University of Tennessee

  • Cristian Batista

    • University of Tennessee

  • Mark P. M. Dean

    • Brookhaven National Laboratory

  • Jian Liu

    • University of Tennessee
    • Univ of Tennessee, Knoxville
    • University of Tennessee, Knoxville