Defect-controlled vortex generation in current-carrying narrow superconducting strips

被引：14

作者：

Vodolazov, D. Yu ^{[1
,2
]}

Ilin, K. ^{[3
]}

Merker, M. ^{[3
]}

Siegel, M. ^{[3
]}

机构：

[1] Russian Acad Sci, Inst Phys Microstruct, GSP 105, Nizhnii Novgorod 603950, Russia

[2] Lobachevsky State Univ Nizhny Novgorod, 23 Gagarin Ave, Nizhnii Novgorod 603950, Russia

[3] Karlsruhe Inst Technol, Inst Micro & Nanoelect Syst IMS, Hertzstr 16, D-76187 Karlsruhe, Germany

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2016年 / 29卷 / 02期

基金：

俄罗斯基础研究基金会;

关键词：

superconducting detector; vortex nucleation; critical current; ARRAYS; ENTRY;

D O I：

10.1088/0953-2048/29/2/025002

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We experimentally study the effect of a single circular hole on the critical current I-c of narrow superconducting strip with width W much smaller than Pearl penetration depth Lambda. We found non-monotonous dependence of I-c on the location of a hole across the strip and a weak dependence of I-c on the radius of a hole. in the case of a hole with epsilon << R << W (epsilon is a superconducting coherence length) which is placed in the center of strip. The observed effects are caused by competition of two mechanisms of destruction of superconductivity-the entrance of vortex via the edge of the strip and the nucleation of the vortex-antivortex pair near the hole. The mechanisms are clearly distinguishable by a difference in dependence of Ic on weak magnetic field.

引用

页数：7

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