Avalanches and self-organized criticality in superconductors

被引：20

作者：

Wijngaarden, RJ ^{[1
]}

Welling, MS ^{[1
]}

Aegerter, CM ^{[1
]}

Menghini, M ^{[1
]}

机构：

[1] Free Univ Amsterdam, Dept Phys & Astron, Fac Sci, NL-1081 HV Amsterdam, Netherlands

来源：

EUROPEAN PHYSICAL JOURNAL B | 2006年 / 50卷 / 1-2期

关键词：

D O I：

10.1140/epjb/e2006-00063-7

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We review the use of superconductors as a playground for the experimental study of front roughening and avalanches. Using the magneto-optical technique, the spatial distribution of the vortex density in the sample is monitored as a function of time. The roughness and growth exponents corresponding to the vortex `landscape' are determined and compared to the exponents that characterize the avalanches in the framework of Self-Organized Criticality. For those situations where a thermo-magnetic instability arises, an analytical non-linear and non-local model is discussed, which is found to be consistent to great detail with the experimental results. On anisotropic substrates, the anisotropy regularizes the avalanches.

引用

页码：117 / 122

页数：6

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