2-DIMENSIONAL VORTEX FLUCTUATIONS IN THE NONLINEAR CURRENT-VOLTAGE CHARACTERISTICS FOR HIGH-TEMPERATURE SUPERCONDUCTORS

被引：125

作者：

JENSEN, HJ ^{[1
]}

MINNHAGEN, P ^{[1
]}

机构：

[1] UMEA UNIV,DEPT THEORET PHYS,S-90187 UMEA,SWEDEN

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.66.1630

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The nonlinear current-voltage (I-V) characteristics are discussed in terms of thermally activated vortex-antivortex pairs in the CuO2 planes. The interaction energy of the two vortices in a pair grows linearly with their separation due to the interplane coupling. This linear interaction gives rise to a critical current which decreases linearly with the temperature. The I-V characteristics has the form V approximately I(I - Ic)a(T)-1. Comparisons with experiments on Y-Ba-Cu-O are discussed. We suggest that the I-V data in the case of a magnetic field may be associated with a thermal vortex-unbinding transition.

引用

页码：1630 / 1633

页数：4

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