Vortex configurations in a Pb/Cu microdot with a 2 × 2 antidot cluster
Vortex configurations in a Pb/Cu microdot with a 2 × 2 antidot cluster
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具有 2 × 2 反点簇的 Pb/Cu 微粒中的涡旋构型
DOI：
10.1103/physrevb.58.5744
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发表时间：
1998
影响因子：
3.7
通讯作者：
Rik Jonckheere
中科院分区：
文献类型：
--
作者：
Teresa Puig;E. Rosseel;L. V. Look;M. J. Bael;V. Moshchalkov;Y. Bruynseraede;Rik Jonckheere
我们提出了一个详细的研究超导Pb/Cu微点与2x2反点团簇的输运性质。测量了该结构的超导-正常（S/N）相界、临界电流和电流-电压特性。作为场B的函数的S/N相边界（T_c（B））揭示了由有限数量的可能的涡旋构型引起的振荡结构，这些涡旋构型可以在这些小的钉扎中心（反点）簇中实现。利用临界电流（J_c（B））和电压-电流（V（I））特性数据分析了这些结构的稳定性，并讨论了可能的耗散机制。将T_c（B）和J_c（B）的实验数据与Ginzburg-Landau理论的伦敦极限的计算结果进行了比较，证实了涡旋确实可以被反点钉扎形成团簇，并且涡旋的基态构型可以通过向结构中输送电流而得到显著的改变。本文还讨论了2 × 2反点团簇中产生位相滑移和涡旋运动的可能性。
We present a detailed study of the transport properties of a superconducting Pb/Cu microdot with a 2x2 antidot cluster. The superconducting-normal (S/N) phase boundary, critical currents and current-voltage characteristics of this structure have been measured. The S/N phase boundary as a function of field B (T_c(B)) reveals an oscillatory structure caused by the limited number of possible vortex configurations which can be realized in these small clusters of pinning centres (antidots). We have analyzed the stability of these configurations and discussed the possible dissipation mechanisms using the critical current (J_c(B)) and voltage-current (V(I)) characteristics data. A comparison of the experimental data of T_c(B) and J_c(B) with calculations in the London limit of the Ginzburg-Landau theory confirms that vortices can indeed be pinned by the antidots forming a cluster and that the ground-state configurations of the vortices are noticeably modified by sending current through the structure. The possibility of generating phase-slips as well as motion of the vortices in the 2x2 antidot cluster has also been discussed.
影响因子：
3.7
作者：
Whissell PD;Tohyama S;Martin LJ
通讯作者：
Martin LJ