Department of Applied Physics and Quantum Phase Electronics Center (QPEC), University of Tokyo, Tokyo 113-8656, Japan.
Phys Rev Lett. 2012 Jul 20;109(3):037603. doi: 10.1103/PhysRevLett.109.037603.
We have investigated the low-energy dynamics of the triangular lattice of Skyrmions in a helimagnetic insulator Cu2OSeO3 in terms of microwave response. We have observed two elementary excitations of the Skyrmion with different polarization characteristics: the counterclockwise circulating mode at 1 GHz with the magnetic field polarization parallel to the Skyrmion plane and the breathing mode at 1.5 GHz with a perpendicular magnetic field polarization. These modes reflect the topological nature of Skyrmions and may play a central role in the Skyrmion dynamics.
我们研究了手性磁性绝缘体 Cu2OSeO3 中三角晶格上的斯格明子的低能动力学，通过微波响应进行研究。我们观察到了两种具有不同极化特性的斯格明子基本激发模式：磁场极化方向与斯格明子平面平行的顺时针循环模式，频率为 1GHz；磁场极化方向垂直于斯格明子平面的呼吸模式，频率为 1.5GHz。这些模式反映了斯格明子的拓扑性质，可能在斯格明子动力学中发挥核心作用。
