In this work, we studied the dynamics of the kinematic vortices (kV) in a mesoscopic superconductor under the influence of external applied magnetic fields (H) and transport currents (Jtr). A Jtr(H) phase diagram is determined. We show that the vortex dynamics are profoundly affected by the presence of constrictions and by H. We find that between the Meissner and Normal states, the resistive state is comprehended by three distinct states. One of these states is a kinematic vortex-antivortex pair for low values of H. For moderate values of fields, the kV state is unpaired and only a single kinematic vortex exists. In the high field regime, the kinematic vortex becomes an Abrikosov-like state with a lower velocity. It was also shown that for tenths of picoseconds, a surface barrier effect acts over the instantaneous velocity of the kV.

中文翻译：

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介观超导桥电阻状态下运动涡流的动力学机制


在这项工作中，我们研究了介观超导体在外部施加磁场（H）和传输电流（Jtr）影响下的运动涡流（kV）动力学。确定Jtr(H)相图。我们表明，涡流动力学受到收缩的存在和 H 的深刻影响。我们发现，在迈斯纳状态和正常状态之间，电阻状态由三种不同的状态组成。其中一种状态是 H 值较低时的运动学涡流-反涡流对。对于中等值的场，kV 状态是不成对的，并且仅存在单个运动学涡流。在高场状态下，运动涡旋变成速度较低的类阿布里科索夫状态。研究还表明，在十分之一皮秒的时间内，表面势垒效应的作用超过了千伏的瞬时速度。