Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf
1 PublikationEstablishing the Fundamental Magnetic Interactions in the Chiral Skyrmionic Mott Insulator Cu2OSeO3 by Terahertz Electron Spin Resonance
Ozerov, M.; Romhanyi, J.; Belesi, M.; Berger, H.; Ansermet, J. P.; van den Brink, J.; Wosnitza, J.; Zvyagin, S. A.; Rousochatzakis, I.
Abstract
The recent discovery of Skyrmionics in Cu2OSeO3 has established a new platform to create and manipulate Skyrmionic spin textures. We use high-field electron spin resonance with a terahertz free-electron laser and pulsed magnetic fields up to 64 T to probe and quantify its microscopic spin-spin interactions. In addition to the previously observed long-wavelength Goldstone mode, this technique probes also the high-energy part of the excitation spectrum which is inaccessible by standard low-frequency electron spin resonance. Fitting the behavior of the observed modes in magnetic field to a theoretical framework establishes experimentally that the fundamental magnetic building blocks of this Skyrmionic magnet are rigid, highly entangled and weakly coupled tetrahedra.
Beteiligte Forschungsanlagen
- Hochfeld-Magnetlabor (HLD)
-
Physical Review Letters 113(2014), 157205
DOI: 10.1103/PhysRevLett.113.157205
Cited 36 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-21047