Zhang Xichao, Ezawa Motohiko, Zhou Yan
Department of Physics, University of Hong Kong, Hong Kong, China.
Department of Applied Physics, University of Tokyo, Hongo 7-3-1, Tokyo 113-8656, Japan.
Sci Rep. 2015 Mar 24;5:9400. doi: 10.1038/srep09400.
Magnetic skyrmions, which are topological particle-like excitations in ferromagnets, have attracted a lot of attention recently. Skyrmionics is an attempt to use magnetic skyrmions as information carriers in next generation spintronic devices. Proposals of manipulations and operations of skyrmions are highly desired. Here, we show that the conversion, duplication and merging of isolated skyrmions with different chirality and topology are possible all in one system. We also demonstrate the conversion of a skyrmion into another form of a skyrmion, i.e., a bimeron. We design spin logic gates such as the AND and OR gates based on manipulations of skyrmions. These results provide important guidelines for utilizing the topology of nanoscale spin textures as information carriers in novel magnetic sensors and spin logic devices.
磁斯格明子是铁磁体中类似拓扑粒子的激发态，近来备受关注。斯格明子电子学试图将磁斯格明子用作下一代自旋电子器件中的信息载体。人们迫切需要有关斯格明子操控和操作的方案。在此，我们表明，在一个系统中，具有不同手性和拓扑结构的孤立斯格明子的转换、复制和合并都是可能的。我们还演示了将一个斯格明子转换为另一种形式的斯格明子，即双斯格明子。我们基于斯格明子的操控设计了诸如与门和或门等自旋逻辑门。这些结果为在新型磁传感器和自旋逻辑器件中利用纳米级自旋纹理的拓扑结构作为信息载体提供了重要指导。
