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Robust spin correlations at high magnetic fields in the harmonic honeycomb iridates

Author

Listed:
  • K. A. Modic

    (Los Alamos National Laboratory
    Max-Planck-Institute for Chemical Physics of Solids)

  • B. J. Ramshaw

    (Los Alamos National Laboratory
    Cornell University)

  • J. B. Betts

    (Los Alamos National Laboratory)

  • Nicholas P. Breznay

    (Lawrence Berkeley National Laboratory
    University of California)

  • James G. Analytis

    (Lawrence Berkeley National Laboratory
    University of California)

  • Ross D. McDonald

    (Los Alamos National Laboratory)

  • Arkady Shekhter

    (Florida State University)

Abstract

The complex antiferromagnetic orders observed in the honeycomb iridates are a double-edged sword in the search for a quantum spin-liquid: both attesting that the magnetic interactions provide many of the necessary ingredients, while simultaneously impeding access. Focus has naturally been drawn to the unusual magnetic orders that hint at the underlying spin correlations. However, the study of any particular broken symmetry state generally provides little clue about the possibility of other nearby ground states. Here we use magnetic fields approaching 100 Tesla to reveal the extent of the spin correlations in γ-lithium iridate. We find that a small component of field along the magnetic easy-axis melts long-range order, revealing a bistable, strongly correlated spin state. Far from the usual destruction of antiferromagnetism via spin polarization, the high-field state possesses only a small fraction of the total iridium moment, without evidence for long-range order up to the highest attainable magnetic fields.

Suggested Citation

  • K. A. Modic & B. J. Ramshaw & J. B. Betts & Nicholas P. Breznay & James G. Analytis & Ross D. McDonald & Arkady Shekhter, 2017. "Robust spin correlations at high magnetic fields in the harmonic honeycomb iridates," Nature Communications, Nature, vol. 8(1), pages 1-5, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-00264-6
    DOI: 10.1038/s41467-017-00264-6
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