Article ; Online: Magnon spectrum of the helimagnetic insulator Cu2OSeO3.
Nature communications
2016 Volume 7, Page(s) 10725
Abstract: ... the full three-dimensional spin-excitation spectrum of Cu2OSeO3 over a broad range of energies. Distinct ... 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 ...
| 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. |
|---|---|
| Language | English |
| Publishing date | 2016-02-25 |
| Publishing country | England |
| Document type | Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S. |
| ISSN | 2041-1723 |
| ISSN (online) | 2041-1723 |
| DOI | 10.1038/ncomms10725 |
| Database | MEDical Literature Analysis and Retrieval System OnLINE |
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