Spin excitations in the skyrmion host Cu2OSeO3

  • We have used inelastic neutron scattering to measure the magnetic excitation spectrum along the high-symmetry directions of the first Brillouin zone of the magnetic skyrmion hosting compound Cu2OSeO3. The majority of our scattering data are consistent with the expectations of a recently proposed model for the magnetic excitations in Cu2OSeO3, and we report best-fit parameters for the dominant exchange interactions. Important differences exist, however, between our experimental findings and the model expectations. These include the identification of two energy scales that likely arise due to neglected anisotropic interactions. This feature of our work suggests that anisotropy should be considered in future theoretical work aimed at the full microscopic understanding of the emergence of the skyrmion state in this material.

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Author:G. S. Tucker, J. S. White, J. Romhányi, Dávid Szaller, István KézsmárkiORCiDGND, B. Roessli, U. Stuhr, A. Magrez, F. Groitl, P. Babkevich, P. Huang, I. Živković, H. M. Rønnow
Frontdoor URLhttps://opus.bibliothek.uni-augsburg.de/opus4/43660
Parent Title (English):Physical Review B
Publisher:American Physical Society (APS)
Year of first Publication:2016
Publishing Institution:Universität Augsburg
Release Date:2018/11/16
First Page:054401
Institutes:Mathematisch-Naturwissenschaftlich-Technische Fakultät
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Experimentalphysik V
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):Deutsches Urheberrecht