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Portnichenko PY, Romhányi J, Onykiienko YA, et al. Magnon spectrum of the helimagnetic insulator Cu2OSeO3. Nat Commun. 2016;7:10725doi: 10.1038/ncomms10725.
Portnichenko, P. Y., Romhányi, J., Onykiienko, Y. A., Henschel, A., Schmidt, M., Cameron, A. S., Surmach, M. A., Lim, J. A., Park, J. T., Schneidewind, A., Abernathy, D. L., Rosner, H., van den Brink, J., & Inosov, D. S. (2016). Magnon spectrum of the helimagnetic insulator Cu2OSeO3. Nature communications, 710725. https://doi.org/10.1038/ncomms10725
Portnichenko, P Y, et al. "Magnon spectrum of the helimagnetic insulator Cu2OSeO3." Nature communications vol. 7 (2016): 10725. doi: https://doi.org/10.1038/ncomms10725
Portnichenko PY, Romhányi J, Onykiienko YA, Henschel A, Schmidt M, Cameron AS, Surmach MA, Lim JA, Park JT, Schneidewind A, Abernathy DL, Rosner H, van den Brink J, Inosov DS. Magnon spectrum of the helimagnetic insulator Cu2OSeO3. Nat Commun. 2016 Feb 25;7:10725. doi: 10.1038/ncomms10725. PMID: 26911567; PMCID: PMC4773425.
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Nat Commun. 2016 Feb 25;7:10725. doi: 10.1038/ncomms10725.

Magnon spectrum of the helimagnetic insulator Cu2OSeO3.

Nature communications

P Y Portnichenko, J Romhányi, Y A Onykiienko, A Henschel, M Schmidt, A S Cameron, M A Surmach, J A Lim, J T Park, A Schneidewind, D L Abernathy, H Rosner, Jeroen van den Brink, D S Inosov

Affiliations

  1. Institut für Festkörperphysik, TU Dresden, Helmholtzstraße 10, D-01069 Dresden, Germany.
  2. Max Planck Institute for Solid State Research, Heisenbergstraße 1, D-70569 Stuttgart, Germany.
  3. Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, D-01187 Dresden, Germany.
  4. Heinz Maier-Leibnitz Zentrum (MLZ), TU München, Lichtenbergstraße 1, D-85747 Garching, Germany.
  5. Jülich Centre for Neutron Science (JCNS), Forschungszentrum Jülich GmbH, Outstation at Heinz Maier-Leibnitz Zentrum (MLZ), Lichtenbergstraße 1, D-85747 Garching, Germany.
  6. Quantum Condensed Matter Division, Oak Ridge National Laboratory (ORNL), Oak Ridge, Tennessee 37831, USA.
  7. Leibniz Institute for Solid State and Materials Research, IFW Dresden, Helmholtzstraße 20, D-01069 Dresden, Germany.

PMID: 26911567 PMCID: PMC4773425 DOI: 10.1038/ncomms10725

Abstract

Complex low-temperature-ordered states in chiral magnets are typically governed by a competition between multiple magnetic interactions. The chiral-lattice multiferroic Cu2OSeO3 became the first insulating helimagnetic material in which a long-range order of topologically stable spin vortices known as skyrmions was established. Here we employ state-of-the-art inelastic neutron scattering to comprehend the full three-dimensional spin-excitation spectrum of Cu2OSeO3 over a broad range of energies. Distinct types of high- and low-energy dispersive magnon modes separated by an extensive energy gap are observed in excellent agreement with the previously suggested microscopic theory based on a model of entangled Cu4 tetrahedra. The comparison of our neutron spectroscopy data with model spin-dynamical calculations based on these theoretical proposals enables an accurate quantitative verification of the fundamental magnetic interactions in Cu2OSeO3 that are essential for understanding its abundant low-temperature magnetically ordered phases.

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