Irreversibility, mechanical entanglement and thermal melting in superconducting vortex crystals with point impurities

被引：274

作者：

Ertas, D ^{[1
]}

Nelson, DR ^{[1
]}

机构：

[1] HARVARD UNIV, DEPT PHYS, CAMBRIDGE, MA 02138 USA

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1996年 / 272卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

flux lattice melting; flux pinning; irreversibility; topological defects;

D O I：

10.1016/S0921-4534(96)00563-1

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We discuss the onset of irreversibility and entanglement of vortex lines in high T-c superconductors due to point disorder and thermal fluctuations using a simplified cage model. A combination of Flory arguments, known results from directed polymers in random media, and a Lindemann criterion are used to estimate the field and temperature dependence of irreversibility, mechanical entanglement and thermal melting. The qualitative features oi this dependence, including its nonmonotonicity when disorder is sufficiently strong, are in good agreement with recent experiments.

引用

页码：79 / 86

页数：8

共 34 条

[1] DELOCALIZATION OF FLUX LINES FROM EXTENDED DEFECTS BY BULK RANDOMNESS [J].