Electromagnetic interaction of vortices in layered superconducting structures
Electromagnetic interaction of vortices in layered superconducting structures
复制标题
层状超导结构中涡流的电磁相互作用
DOI：
10.1051/jphys:0199000510170197100
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
D. Feinberg
中科院分区：
文献类型：
--
作者：
A. Buzdin;D. Feinberg
考虑了一个层间纯电磁耦合的多层超导系统。本文导出了局部化于层中的任意形状点涡的能量的一般公式。结果表明，位于同一层上的涡和反涡的相互作用能在很大的距离上依赖于它们之间的距离。文中还讨论了垂直场中涡线的结构。根据层间距离d与有效单层屏蔽长度λ eff = λ 2 L/d 0的比值，出现了两种不同的状态，其中λL是层中的伦敦屏蔽长度，λ 0是层厚度。由于λL的温度依赖性，预期第一临界场Hc 1的行为在Tc以下显示出交叉。
A multilayered superconducting system with a purely electromagnetic coupling between layers is considered. A general formula is derived for the energy of an arbitrary configuration of point vortices localized in the layers. It is shown that the interaction energy of a vortex and an antivortex located on the same layer depends logarithmically on their distance for large distances. The structure of a vortex line in perpendicular fields is also considered. Two different regimes appear, depending on the ratio of the interlayer distance d to the effective one-layer screening length λ eff = λ 2L/ d0 where λL is the London screening length in the layers and do the layer thickness. Due to the temperature dependence of λL, the behaviour of the first critical field H c1 is expected to show a crossover below Tc.