The accurate understanding of flux dynamics is essential for the design and operation of superconducting circuits. The time evolution of flux-density distribution in an NbN strip by the transport current was observed using high-speed magneto-optical microscopy. It was determined that even for the dynamic penetration and exclusion of vortices under the transport current, the surface barrier is essential. This feature is important for the correct understanding of the complex behavior of state-of-the-art superconducting devices.

中文翻译：

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脉冲驱动超导体中磁通分布的高速磁光成像动态演化

准确理解通量动力学对于超导电路的设计和操作至关重要。使用高速磁光显微镜观察传输电流对 NbN 条中通量密度分布的时间演变。已经确定，即使对于在传输电流下的涡流的动态穿透和排除，表面屏障也是必不可少的。此功能对于正确理解最先进的超导设备的复杂行为非常重要。