Critical current-voltage scaling of heavy-ion–irradiated Bi2Sr2CaCu2O8 + δ and (K,Ba)BiO3 superconductors
Critical current-voltage scaling of heavy-ion–irradiated Bi2Sr2CaCu2O8 + δ and (K,Ba)BiO3 superconductors
复制标题
重离子辐照 Bi2Sr2CaCu2O8 + δ 和 (K,Ba)BiO3 超导体的临界电流-电压缩放
DOI：
10.1209/epl/i2004-10236-0
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
L. Ammor
中科院分区：
文献类型：
--
作者：
A. Ruyter;V. Hardy;N. H. Hong;L. Ammor
研究了高各向异性Bi_2Sr_2CaCu_2O_（8+）的电流-电压特性，Bi1.8Pb0.2Sr2CaCu2O8 +？以及在平行于c轴的方向上照射的各向同性（K，Ba）BiO 3单晶。在磁场从B/10到B的范围内（其中B是匹配场），相同的标度函数可以用于描述这两个系统中的转变。场和样品独立的临界指数，这被发现是？？= 1.1？0.1，z = 5.3？0.2使用？( ? ??/??) = 2，与强屏蔽涡线相互作用的数值模拟非常一致。此外，尽管各向异性差异很大，但所获得的标度是相同的。
Current-voltage characteristics were investigated in highly anisotropic Bi2Sr2CaCu2O8 + ?, Bi1.8Pb0.2Sr2CaCu2O8 + ? and isotropic (K,Ba)BiO3 single crystals which were irradiated in the direction parallel to the c-axis. In the range of magnetic fields from B/10 to B (where B is the matching field), same scaling functions can be used to describe the transition in those two systems. The field- and sample-independent critical exponents, which were found to be ?? = 1.1 ? 0.1, z = 5.3 ? 0.2 using ?( ? ??/??) = 2, are in a very good agreement with numerical simulations for strongly screened vortex line interactions. Moreover, the obtained scalings are the same despite a large difference in anisotropy.