论文标题
II型和三维的II超导体中的涡旋 - 固定/玻璃与涡旋 - 流体转变附近的通用缩放行为
Universal scaling behaviour near vortex-solid/glass to vortex-fluid transition in type-II superconductors in two- and three-dimensions
论文作者
论文摘要
在本文中，我们提供了证据表明在II类型超导体（SC）中存在涡旋 - 固体/玻璃（VG）到涡旋 - 流体（VF）转变。我们通过研究磁化和电流 - 电压特性的研究，在NBN的2D和3D膜中探测了VG到VF的跃迁。与该相变相对应的动力指数是从两组测量值中独立提取的。发现2D和3D SC的$ H $ - $ T $相图在临界点附近有很大不同。在3D SC的情况下，从两个独立测量值获得的指数值显示出极好的匹配。另一方面，对于2D SC，从两个实验获得的指数显着差异。我们将其归因于以下事实：特征长度尺度在2D SC中以与3D对应形式的缩放行为截然不同的方式在临界点附近差异。
In this article, we present evidence for the existence of vortex-solid/glass (VG) to vortex-fluid (VF) transition in a type-II superconductor (SC), NbN. We probed the VG to VF transition in both 2D and 3D films of NbN through studies of magnetoresistance and current-voltage characteristics. The dynamical exponents corresponding to this phase transition were extracted independently from the two sets of measurements. The $H$-$T$ phase diagram for the 2D and 3D SC are found to be significantly different near the critical point. In the case of 3D SC, the exponent values obtained from the two independent measurements show excellent match. On the other hand, for the 2D SC, the exponents obtained from the two experiments were significantly different. We attribute this to the fact that the characteristic length scale diverges near the critical point in a 2D SC in a distinctly different way from its 3D counterpart form scaling behaviour.
