Conductivity fluctuations in a single crystal of Bi2Sr2CaCu2Ox.
Conductivity fluctuations in a single crystal of Bi2Sr2CaCu2Ox.
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Bi2Sr2CaCu2Ox 单晶的电导率波动。
DOI：
10.1103/physrevb.48.6703
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
Joo
中科院分区：
文献类型：
--
作者：
Mun;Lee;Suck Salk SH;Shin;Joo
我们对 Bi 2 Sr 2 CaCu 2 O x 高 T c 超导体单晶的超导有序参数波动所产生的测量过量电导率进行了分析。在 84-245 K 温度范围内测得的过量电导率最适合二维 (2D) Aslamazov-Larkin 理论。利用该理论，得到的2D特征长度为12.6 A，在物理上可接受的范围内。我们发现Lawrence-Doniach理论预测的层间耦合强度导致c方向相干长度值太小
We present an analysis of the measured excess conductivity that results from the fluctuations of the superconducting order parameter for a single crystal of the Bi 2 Sr 2 CaCu 2 O x high-T c superconductor. The measured excess conductivity in the temperature range 84-245 K is best fitted by the two-dimensional (2D) Aslamazov-Larkin theory. By using this theory, the 2D characteristic length was obtained to be 12.6 A, which is within a physically acceptable range. We find that the interlayer coupling strength predicted by the Lawrence-Doniach theory leads to too small a value of the c-direction coherence length