Dynamic scaling for 2D superconductors in zero magnetic field

被引：19

作者：

Ammirata, SM

Friesen, M

Pierson, SW

Gorham, LA

Hunnicutt, JC

Trawick, ML

Keener, CD

机构：

[1] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

[2] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA

[3] Worcester Polytech Inst, Dept Phys, Worcester, MA 01609 USA

来源：

PHYSICA C | 1999年 / 313卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

dynamic scaling; 2D superconductors; zero magnetic field; Kosterlitz-Thouless dynamics;

D O I：

10.1016/S0921-4534(99)00010-6

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Zero-field current-voltage (I-V) characteristics of a thin ('two-dimensional') Bi2Sr2CaCu2O8+delta crystal are reported and analyzed in two ways. The 'conventional' approach yields ambiguous results while the dynamical scaling analysis of Fisher and Huse offers new insights into the Kosterlitz-Thouless-Berezinskii transition. The scaling theory predicts that the universal jump of the I-V exponent alpha should be between z + 1 and 1. We obtain a value of z similar or equal to 5.6 for the dynamical critical exponent, which is corroborated by data from other two-dimensional superconductors. A simple dynamical model is presented to account for the results. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：225 / 231

页数：7

共 40 条

[21] FLUX-FLOW RESISTIVITY IN MODEL HIGH-TEMPERATURE SUPERCONDUCTORS [J].