论文标题
天空晶体的相移
Phase Shift in Skyrmion Crystals
论文作者
论文摘要
Skyrmion Crystal是旋转拓扑旋转纹理的周期性阵列。由于它被多个螺旋自旋密度波视为干扰模式，因此质地随成分波之间的相对相变化。尽管自由度的相位不仅与磁性有关，而且与运输特性有关，但迄今为止尚未阐明其效果。从理论上讲，我们在这里表明，在Skyrmion晶体中可能发生相移，以用交错的标量旋转手性稳定四轴涡流晶体。这导致晶格对称性的自发断裂，即使没有相对论的自旋轨道耦合，也会导致非临界转运现象。我们表明，这种相移是由旋转式耦合系统中的远程手性相互作用或热波动驱动的。
The skyrmion crystal is a periodic array of a swirling topological spin texture. Since it is regarded as an interference pattern by multiple helical spin density waves, the texture changes with the relative phases among the constituent waves. Although the phase degree of freedom is relevant to not only magnetism but also transport properties, its effect has not been elucidated thus far. We here theoretically show that a phase shift can occur in the skyrmion crystals to stabilize tetra-axial vortex crystals with staggered scalar spin chirality. This leads to spontaneous breaking of the lattice symmetry, which results in nonreciprocal transport phenomena even without the relativistic spin-orbit coupling. We show that such a phase shift is driven by long-range chirality interactions or thermal fluctuations in spin-charge coupled systems.
