Giant magnetic response in layered antiferromagnetic iridate heterostructures

Bulletin of the American Physical Society

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85th Annual Meeting of the APS Southeastern Section

Volume 63, Number 19

Thursday–Saturday, November 8–10, 2018; Holiday Inn at World’s Fair Park, Knoxville, Tennessee

Session E01: Condensed Matter III

8:30 AM–10:30 AM, Friday, November 9, 2018
Holiday Inn Knoxville Downtown Room: Summit

Chair: Jian Liu, University of Tennessee, Knoxville

Abstract ID: BAPS.2018.SES.E01.2

Abstract: E01.00002 : Giant magnetic response in layered antiferromagnetic iridate heterostructures*

8:42 AM–8:54 AM

Abstract

Presenter:

Lin Hao
(University of Tennessee)

Authors:

Lin Hao
(University of Tennessee)

Derek Meyers
(Brookhaven National Laboratory)

Hidemaro Suwa
(University of Tennessee)

Junyi Yang
(University of Tennessee)

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)

Collaboration:

The authors acknowledge experimental assistance from H. D. Zhou, E. Karapetrova, C. Rouleau, Z. Gai, J. K. Keum and N. Traynor. The authors would like to thank E. Dagotto, I. Zalzinyak, D. McMorrow, J.-H. Chu and H. D. Zhou

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.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.SES.E01.2

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