Temperature-driven transition from skyrmion to bubble crystals in centrosymmetric itinerant magnets
Temperature-driven transition from skyrmion to bubble crystals in centrosymmetric itinerant magnets
复制标题
中心对称流动磁体中温度驱动的从斯格明子到气泡晶体的转变
DOI：
10.1088/1367-2630/ac3683
复制
发表时间：
2021
影响因子：
3.3
通讯作者：
Hayami Satoru
中科院分区：
文献类型：
--
作者：
Matsumoto Takuya;Hayami Satoru;Hayami Satoru
巡游磁体中巡游电子与局域自旋的相互作用产生了多种非共面多Q自旋织构，如skyrmion、hedgehog、meron和vortex。我们阐明了另一种类型的多Q态共线正弦波，磁泡晶体，出现在有限温度下的中心对称巡回电子系统。通过大规模数值模拟，得到了三角晶格上具有易轴单离子各向异性的经典Kondo晶格模型的结果。我们发现，通过改变温度，skyrmion晶体和气泡晶体之间发生有限温度拓扑相变。我们通过分析一个有效的自旋模型，其中多自旋相互作用和磁各向异性之间的协同作用起着重要的作用，获得诱导有限温度转变的最小关键成分。
Interplay between itinerant electrons and localized spins in itinerant magnets gives rise to a variety of noncoplanar multiple-Q spin textures, such as the skyrmion, hedgehog, meron, and vortex. We elucidate that another type of multiple-Q state consisting of collinear sinusoidal waves, a magnetic bubble crystal, appears at finite temperatures in a centrosymmetric itinerant electron system. The results are obtained for the classical Kondo lattice model with easy-axis single-ion anisotropy on a triangular lattice by a large-scale numerical simulation. We find that a finite-temperature topological phase transition between the skyrmion crystal and the bubble crystal occurs by changing the temperature. We obtain the minimal key ingredients for inducing the finite-temperature transition by analyzing an effective spin model where it is shown that the synergy between the multiple-spin interaction and magnetic anisotropy plays a significant role.