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Fragmentation in spin ice from magnetic charge injection

Author

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  • E. Lefrançois

    (Institut Laue Langevin
    Institut Néel, CNRS and Univ. Grenoble Alpes
    Max Planck Institute for Solid State Research)

  • V. Cathelin

    (Institut Néel, CNRS and Univ. Grenoble Alpes)

  • E. Lhotel

    (Institut Néel, CNRS and Univ. Grenoble Alpes)

  • J. Robert

    (Institut Néel, CNRS and Univ. Grenoble Alpes)

  • P. Lejay

    (Institut Néel, CNRS and Univ. Grenoble Alpes)

  • C. V. Colin

    (Institut Néel, CNRS and Univ. Grenoble Alpes)

  • B. Canals

    (Institut Néel, CNRS and Univ. Grenoble Alpes)

  • F. Damay

    (Laboratoire Léon Brillouin, CEA, CNRS, Univ. Paris-Saclay)

  • J. Ollivier

    (Institut Laue Langevin)

  • B. Fåk

    (Institut Laue Langevin)

  • L. C. Chapon

    (Institut Laue Langevin
    Diamond Light Source Ltd., Harwell Science and Innovation Campus)

  • R. Ballou

    (Institut Néel, CNRS and Univ. Grenoble Alpes)

  • V. Simonet

    (Institut Néel, CNRS and Univ. Grenoble Alpes)

Abstract

The complexity embedded in condensed matter fertilizes the discovery of new states of matter, enriched by ingredients like frustration. Illustrating examples in magnetic systems are Kitaev spin liquids, skyrmions phases, or spin ices. These unconventional ground states support exotic excitations, for example the magnetic charges in spin ices, also called monopoles. Here, we propose a mechanism to inject monopoles in a spin ice at equilibrium through a staggered magnetic field. We show theoretically, and demonstrate experimentally in the Ho2Ir2O7 pyrochlore iridate, that it results in the stabilization of a monopole crystal, which exhibits magnetic fragmentation. In this new state of matter, the magnetic moment fragments into an ordered part and a persistently fluctuating one. Compared to conventional spin ices, the different nature of the excitations in this fragmented state opens the way to tunable field-induced and dynamical behaviors.

Suggested Citation

  • E. Lefrançois & V. Cathelin & E. Lhotel & J. Robert & P. Lejay & C. V. Colin & B. Canals & F. Damay & J. Ollivier & B. Fåk & L. C. Chapon & R. Ballou & V. Simonet, 2017. "Fragmentation in spin ice from magnetic charge injection," Nature Communications, Nature, vol. 8(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-00277-1
    DOI: 10.1038/s41467-017-00277-1
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