论文标题
在中心对称四方磁体中巡回挫败的多个天际晶体阶段
Multiple skyrmion crystal phases by itinerant frustration in centrosymmetric tetragonal magnets
论文作者
论文摘要
以多种螺旋调制表示的天空晶体（SKX）不仅在其特殊的磁纹理中表现出来，而且在源自新兴磁场的非平凡的传输特性中也表现出来。我们在这里报告了中心对称四方晶体系统中多个SKX的数值结果。通过为巡回磁铁进行有效的自旋模型进行模拟退火，我们发现三种类型的SKX具有一个和两个的天空数字，其特征在于不同的螺旋叠加，在基态下稳定，并通过外部磁场进行转换。出现的多个SKX的本质在于巡回挫败感，由于巡回电子的性质，交换相互作用在动量空间中竞争。
A skyrmion crystal (SkX) expressed as a multiple number of spiral modulations manifests itself not only in its peculiar magnetic texture but also in nontrivial transport properties originating from an emergent magnetic field. We here report our numerical results for multiple SkXs in a centrosymmetric tetragonal crystal system. By performing simulated annealing for an effective spin model for itinerant magnets, we find that three types of the SkXs with the skyrmion numbers of one and two, which are characterized by different superpositions of helices, are stabilized in the ground state, and are transformed by an external magnetic field. The essence of the emergent multiple SkXs is lied in itinerant frustration where exchange interactions are competed in momentum space due to the nature of itinerant electrons.
