CURRENT-VOLTAGE CHARACTERISTICS OF 2-DIMENSIONAL VORTEX-GLASS MODELS

被引:74
作者
HYMAN, RA
WALLIN, M
FISHER, MPA
GIRVIN, SM
YOUNG, AP
机构
[1] ROYAL INST TECHNOL,DEPT THEORET PHYS,S-10044 STOCKHOLM,SWEDEN
[2] UNIV CALIF SANTA BARBARA,INST THEORET PHYS,SANTA BARBARA,CA 93106
[3] UNIV CALIF SANTA CRUZ,DEPT PHYS,SANTA CRUZ,CA 95064
来源
PHYSICAL REVIEW B | 1995年 / 51卷 / 21期
基金
美国国家科学基金会;
关键词
D O I
10.1103/PhysRevB.51.15304
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We have performed Monte Carlo simulations to determine current-voltage characteristics of two vortex-glass models in two dimensions. Our results confirm earlier studies which concluded that there is a zero-temperature transition. Additionally we find that, as the temperature approaches zero, the linear resistance vanishes exponentially, and the current scale Jnl where nonlinearities appear in the current-voltage characteristics, varies roughly as T3. This result is quite different from the prediction of conventional flux creep theory in which Jnl∼T. The results for the two models agree quite well with each other, and also agree fairly well with recent experiments on very thin films of Y-Ba-Cu-O. © 1995 The American Physical Society.
引用
收藏
页码:15304 / 15311
页数:8
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