Distinct magnetic signatures of fractional vortex configurations in multiband superconductors
Distinct magnetic signatures of fractional vortex configurations in multiband superconductors
复制标题
多带超导体中分数涡旋结构的独特磁特征
DOI：
10.1063/1.4904010
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
J. Aguiar
中科院分区：
文献类型：
--
作者：
R. M. D. Silva;M. Milovsevi'c;D. Dom'inguez;F. Peeters;J. Aguiar
据预测，多频带超导体中存在携带部分磁通量子的涡旋，其中涡核可以在超导凝聚体的多个特定频带分量之间分裂。利用两分量Ginzburg-Landau模型，我们研究了平行磁场中两带超导平板中的这种涡旋构型。分数涡的出现是由于不同的涡带进入阈值导致的带选择性涡穿透，并在样品边缘附近稳定下来。我们发现，由此产生的分数涡旋构型在静态磁化强度测量和交流磁化率动态测量中留下了不同的指纹，这两种方法都可以很容易地用于在几个现有的多带超导体中检测这些迷人的涡旋态。
Vortices carrying fractions of a flux quantum are predicted to exist in multiband superconductors, where vortex core can split between multiple band-specific components of the superconducting condensate. Using the two-component Ginzburg-Landau model, we examine such vortex configurations in a two-band superconducting slab in parallel magnetic field. The fractional vortices appear due to the band-selective vortex penetration caused by different thresholds for vortex entry within each band-condensate, and stabilize near the edges of the sample. We show that the resulting fractional vortex configurations leave distinct fingerprints in the static measurements of the magnetization, as well as in ac dynamic measurements of the magnetic susceptibility, both of which can be readily used for the detection of these fascinating vortex states in several existing multiband superconductors.
影响因子：
3.7
作者：
R. Geurts;M. Milovsevi'c;F. Peeters
通讯作者：
R. Geurts;M. Milovsevi'c;F. Peeters