论文标题
Skyrmion在互动Skyrmions的系统中回声
Skyrmion Echo in a system of interacting Skyrmions
论文作者
论文摘要
我们考虑局限于由纳米盘形成的电势中的天空旋转。根据数值和分析计算，我们提出了Skyrmion Echo现象。还提出了Skyrmion Echo形成的物理机制。由于晶格，杂质或固定效果的扭曲，限制的天空阵地的本地场略有不同，从而导致初始信号的消除。天空之间的相互作用也可能有助于逐步的过程。但是，在纳米盘中切换磁化方向（例如，通过自旋转移扭矩）也将天空的螺旋旋转从顺时针方向转换为逆时针（或反之亦然），并恢复初始信号（这是Skyrmion Echo的本质）。
We consider helical rotation of skyrmions confined in the potentials formed by nano-disks. Based on numerical and analytical calculations we propose the skyrmion echo phenomenon. The physical mechanism of the skyrmion echo formation is also proposed. Due to the distortion of the lattice, impurities, or pinning effect, confined skyrmions experience slightly different local fields, which leads to dephasing of the initial signal. The interaction between skyrmions also can contribute to the dephasing process. However, switching the magnetization direction in the nanodiscs (e.g. by spin transfer torque) also switches the helical rotation of the skyrmions from clockwise to anticlockwise (or vice-versa), and this restores the initial signal (which is the essence of skyrmion echo).
