Direct numerical experiment on two-dimensional pinning dynamics of a three-dimensional vortex line in layered superconductors.
Direct numerical experiment on two-dimensional pinning dynamics of a three-dimensional vortex line in layered superconductors.
复制标题
层状超导体中三维涡线的二维钉扎动力学的直接数值实验。
DOI：
10.1103/physrevlett.75.3178
复制
发表时间：
1995
影响因子：
8.6
通讯作者：
Hideo Kaburaki
中科院分区：
文献类型：
--
作者：
Masahiko Machida;Hideo Kaburaki
我们通过对瞬态金兹堡-朗道方程与麦克斯韦方程进行直接数值模拟，阐明了 T c 调制三维 (3D) 层状超导体中倾斜涡流的结构和动力学。观察到涡流动力学从低温区的刚性直线涡流线到高温区的阶梯式涡流的变化。我们研究了柱状和点缺陷的涡旋钉扎，发现在存在钉扎中心的情况下，平行于 3D 连续逐步涡旋层的涡旋段的柔性变形得到加强，并导致 2D 钉扎动力学。此外，这种增加的灵活性被证明可以带来更有效的涡旋钉扎。
We clarify structures and dynamics of tilted vortices in the T c modulated three-dimensional (3D) layered superconductor by performing a direct numerical simulation of the time-dependent Ginzburg-Landau equation coupled with Maxwell's equation. The change of vortex dynamics from a rigid and straight vortex line in the low temperature region to a stepwise vortex in the high temperature region is observed. We investigate vortex pinning for columnar and point defects, and find that a flexible deformation of vortex segments parallel to the layer in the 3D continuous stepwise vortex is reinforced in the presence of pinning centers and leads to 2D pinning dynamics. Also, this increased flexibility is shown to bring about more effective vortex pinning.