具有两个序参量的介观超导环的磁响应
介观与纳米尺度物理
2007-05-23 v2 超导电性
摘要
在不同尺寸的铝超导环中,其磁响应和磁通量子跃迁与双序参量Ginzburg-Landau模型表现出良好的一致性,这些环在可能产生层状结构的条件下沉积。对于中等耦合,我们发现了亚稳态,其中两个序参量在环周围具有不同的相位缠绕数。这些先前在理论上预测的状态,类似于具有双序参量超导性的单连通样品中的分数涡旋。更强的耦合锁定相对相位,使得两个序参量仅在响应的温度依赖性中显现。随着邻近化程度的增加,这一特征逐渐消失。
引用
@article{arxiv.cond-mat/0608287,
title = {Magnetic response of mesoscopic superconducting rings with two order parameters},
author = {Hendrik Bluhm and Nicholas C. Koshnick and Martin E. Huber and Kathryn A. Moler},
journal= {arXiv preprint arXiv:cond-mat/0608287},
year = {2007}
}
备注
4 pages, 3 figures. See http://stanford.edu/group/moler/publications.html for the auxiliary document describing some of the analysis procedures (Ref. 25). Journal version. Rewritten introduction. Some sentences added, some removed, changes in wording. Corrected a few errors, updated references