YBCO高温超导体Josephson阵列体系的I-V特性研究  

RESEARCH OF CURRENT-VOLTAGE CHARACTERISTICS IN JOSEPHSON JUNCTION ARRAYS OF YBCO GRANULAR FILMS

作　　者：肖胜[1] 徐克西[1] 刘石香[1] 付华明[1] 

机构地区：[1]上海大学物理系,上海200436

出　　处：《低温物理学报》2002年第4期287-292,共6页Low Temperature Physical Letters

基　　金：上海市教育发展基金资助项目~~

摘　　要：从磁通运动图象出发 ,推导了YBa2 Cu3O7-δ(YBCO)颗粒膜的I V特性关系式 ,并从实验上加以验证 ,结果表明 :在T <TKT时 ,I V表现出很强的非线性 ,样品主要是非欧姆损耗 ;在T >TKT时 ,I V呈线性关系 ,样品以欧姆损耗为主 ;而在T =TKT时 ,I V将出现突变 ,这跟KThe current-voltage characteristics relation has been deduced from a two-dimensional Josephson junction arrays model and verified by the experiment. From this, we found that the I-V relation is non-linear when T<T-{KT} and the loss in the superconductor belongs to non-ohmloss, however it is linear when T>T-{KT} and the loss belongs to ohmloss, it occurs a sudden change at T=T-{KT}, the result is similar to that described by the Kosterlitz-Thouless transition.

关 键 词：YBCO 高温超导体 Josephson阵列 I-V特性 磁通运动 欧姆损耗 薄膜 

分 类 号：O511.4[理学—低温物理]