DYNAMICS AND NOISE SPECTRA OF A DRIVEN SINGLE FLUX-LINE IN SUPERCONDUCTORS

被引：23
|
作者：
TANG, C
FENG, SC
GOLUBOVIC, L
机构：
[1] UNIV CALIF LOS ANGELES, DEPT PHYS, LOS ANGELES, CA 90024 USA
[2] W VIRGINIA UNIV, DEPT PHYS, MORGANTOWN, WV 26506 USA
来源：
PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 08期
关键词：
D O I：
10.1103/PhysRevLett.72.1264
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study the low temperature dynamics of a single flux line in a bulk type-II superconductor, driven by the Lorentz force acting near the sample surfaces, both near and above the depinning threshold. We find a novel instability of the flux line motion at large driving currents. The power spectrum of the voltage noise generated by the moving flux line in the presence of random pinning has a omega(0.5) and omega(-0.5) form for omega < omega(1) and omega > omega(1), respectively, where omega(1) --> 0 at the depinning threshold.
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页码：1264 / 1267
页数：4
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