Shapiro spikes and negative mobility for skyrmion motion on quasi-one-dimensional periodic substrates
Shapiro spikes and negative mobility for skyrmion motion on quasi-one-dimensional periodic substrates
复制标题
准一维周期性基底上斯格明子运动的夏皮罗尖峰和负迁移率
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
C. Reichhardt
中科院分区：
文献类型：
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作者：
C. Reichhardt;C. Reichhardt
使用一个简单的数值模型的skyrmion在一个二维系统中与准一维周期性基板下的直流和交流相结合的驱动器，其中直流驱动器是垂直于基板的周期性相互作用，我们表明，丰富多样的新颖的锁相动力学可以发生由于马格努斯项的skyrmion动态的影响。而不是夏皮罗步骤，在直流驱动的方向上的速度响应表现出一系列的尖峰，包括延长的直流驱动间隔，其中skyrmions移动的方向相反的直流驱动，产生负迁移率。也有特定的直流驱动值，在该值下，skyrmions完全垂直于直流驱动方向移动，给出了绝对横向迁移率的条件。
Using a simple numerical model of skyrmions in a two-dimensional system interacting with a quasi-one dimensional periodic substrate under combined dc and ac drives where the dc drive is applied perpendicular to the substrate periodicity, we show that a rich variety of novel phase locking dynamics can occur due to the influence of the Magnus term on the skyrmion dynamics. Instead of Shapiro steps, the velocity response in the direction of the dc drive exhibits a series of spikes, including extended dc drive intervals over which the skyrmions move in the direction opposite to the dc drive, producing negative mobility. There are also specific dc drive values at which the skyrmions move exactly perpendicular to the dc drive direction, giving a condition of absolute transverse mobility.
影响因子：
19.6
作者：
Schulz, T.;Ritz, R.;Rosch, A.
通讯作者：
Rosch, A.