Dynamic creation and annihilation of metastable vortex phase as a source of excess noise
Dynamic creation and annihilation of metastable vortex phase as a source of excess noise
复制标题
作为过量噪声源的亚稳态涡旋相的动态产生和消灭
DOI：
10.1209/epl/i2002-00613-1
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Sanjay Bhattacharya
中科院分区：
文献类型：
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作者：
Y. Paltiel;Grzegorz Jung;Grzegorz Jung;Y. Myasoedov;M. Rappaport;E. Zeldov;M. Higgins;Sanjay Bhattacharya;Sanjay Bhattacharya
在超导体的峰值效应附近通常观察到的电压噪声的大幅增加归因于一种新的噪声机制。一个强钉扎亚稳无序涡旋相，这是随机产生的边缘和退火成有序相在散装，导致大的波动，在集成的临界电流的样品。过量的噪音，由于这两个不同的阶段的动态混合物被发现显示明显的重入行为。在Corbino几何结构中，亚稳相的注入被阻止，因此，多余的噪声消失。
The large increase in voltage noise, commonly observed in the vicinity of the peak-effect in superconductors, is ascribed to a novel noise mechanism. A strongly pinned metastable disordered vortex phase, which is randomly generated at the edges and annealed into ordered phase in the bulk, causes large fluctuations in the integrated critical current of the sample. The excess noise due to this dynamic admixture of two distinct phases is found to display pronounced re-entrant behavior. In the Corbino geometry the injection of the metastable phase is prevented and, accordingly, the excess noise disappears.