We studied the influences of the inclusion of different geometrical defects (circle, triangle, and square) with different Ginzburg–Landau parameters [Formula: see text] on the vortex state of a mesoscopic superconducting square immersed in an external applied magnetic field. We calculated the magnetization, vorticity, and density of Cooper pairs for this system, solving the time-dependent Ginzburg–Landau equations. We found a novel and interesting behavior of the vorticity [Formula: see text] at low magnetic fields: a spontaneous generation of anti-vortices due to the breaking inversion symmetry.

中文翻译：

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双组分超导体中异常反涡状态的突然产生

我们研究了包含具有不同 Ginzburg-Landau 参数 [公式：见正文] 的不同几何缺陷（圆形、三角形和方形）对浸入外部施加磁场中的介观超导方形涡流状态的影响。我们计算了该系统库珀对的磁化强度、涡量和密度，求解了与时间相关的金茨堡-朗道方程。我们在低磁场下发现了一种新颖而有趣的涡度行为[公式：见正文]：由于反演对称性的破坏而自发产生了反涡度。