We have investigated the low-energy dynamics of the triangular lattice of Skyrmions in a helimagnetic insulator Cu 2OSeO 3 in terms of microwave response. We have observed two elementary excitations of the Skyrmion with different polarization characteristics: the counterclockwise circulating mode at 1GHz with the magnetic field polarization parallel to the Skyrmion plane and the breathing mode at 1.5GHz with a perpendicular magnetic field polarization. These modes reflect the topological nature of Skyrmions and may play a central role in the Skyrmion dynamics.
ASJC Scopus subject areas
- Physics and Astronomy(all)