This title appears in the Scientific Report :
2016
Please use the identifier:
http://dx.doi.org/10.1038/ncomms10725 in citations.
Please use the identifier: http://hdl.handle.net/2128/9917 in citations.
Magnon spectrum of the helimagnetic insulator Cu$_{2}$OSeO$_{3}$
Magnon spectrum of the helimagnetic insulator Cu$_{2}$OSeO$_{3}$
Complex low-temperature-ordered states in chiral magnets are typically governed by acompetition between multiple magnetic interactions. The chiral-lattice multiferroic Cu2OSeO3became the first insulating helimagnetic material in which a long-range order of topologicallystable spin vortices known as...
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Personal Name(s): | Portnichenko, P. Y. |
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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, Jeroen / Inosov, D. S. (Corresponding author) | |
Contributing Institute: |
Streumethoden; JCNS-2 JCNS-FRM-II; JCNS-FRM-II |
Published in: | Nature Communications, 7 (2016) S. 10725 |
Imprint: |
London
Nature Publishing Group
2016
|
DOI: |
10.1038/ncomms10725 |
PubMed ID: |
26911567 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) FRM II / MLZ |
Subject (ZB): | |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/9917 in citations.
Complex low-temperature-ordered states in chiral magnets are typically governed by acompetition between multiple magnetic interactions. The chiral-lattice multiferroic Cu2OSeO3became the first insulating helimagnetic material in which a long-range order of topologicallystable spin vortices known as skyrmions was established. Here we employ state-of-the-artinelastic neutron scattering to comprehend the full three-dimensional spin-excitation spectrumof Cu2OSeO3 over a broad range of energies. Distinct types of high- and low-energydispersive magnon modes separated by an extensive energy gap are observed in excellentagreement with the previously suggested microscopic theory based on a model of entangledCu4 tetrahedra. The comparison of our neutron spectroscopy data with model spin-dynamicalcalculations based on these theoretical proposals enables an accurate quantitative verificationof the fundamental magnetic interactions in Cu2OSeO3 that are essential for understandingits abundant low-temperature magnetically ordered phases. |