论文标题
动态阶段和旋转和天空的重新进入霍尔效应周期性固定阵列
Dynamic Phases and Reentrant Hall Effect for Vortices and Skyrmions on Periodic Pinning Arrays
论文作者
论文摘要
我们考虑在第一个相称的匹配场附近的正方形基材上进行超导涡流和天空的运动。略高于相应，出现了一系列动态阶段，包括间质流，并且从流体流到孤子流的过渡会产生负差分电导率。略低于相应，空缺率会发生。动态相变在速度曲线，差异迁移率和速度波动中产生特征。当也存在Magnus力时，就像在某些超导涡流或Skyrmion系统中一样，流体状态的膨胀，在较低的驱动器下，流体相位有有限的霍尔角，但在Soliton相中有一个消失的霍尔角，从而引起了重新分厅的效应。我们还找到了一个制度，其中颗粒的大厅运动表现出相同的动态阶段，包括以有限角度的孤子运动在霍尔响应中产生负差分电导率，但在纵向反应中却没有。我们的结果表明，在周期性固定上驱动的涡旋可能是确定是否发生涡流霍尔效应的理想系统，并且也与小马格努斯力量的天空相关。
We consider the motion of superconducting vortices and skyrmions on a square substrate near the first commensurate matching field. Slightly above commensuration, a series of dynamic phases appear including interstitial flow, and there is a transition from fluid flow to soliton flow that generates negative differential conductivity. Slightly below commensuration, vacancy depinning occurs. The dynamic phase transitions produce features in the velocity-force curves, differential mobility, and velocity fluctuations. When a Magnus force is also present, as in certain superconducting vortex or skyrmion systems, there is an expansion of the fluid state, and at lower drives there is a finite Hall angle in the fluid phase but a vanishing Hall angle in the soliton phase, giving rise to a reentrant Hall effect. We also find a regime where the Hall motion of the particles exhibits the same dynamic phases, including soliton motion at a finite angle that produces negative differential conductivity in the Hall response but not in the longitudinal response. Our results suggest that vortices driven over periodic pinning may be an ideal system for determining if a vortex Hall effect is occurring and would also be relevant for skyrmions at smaller Magnus forces.
