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Abstract
Electrical resistivities of epitaxial Bi 2Sr 2CaCu 2O 8+δ films near the superconducting transition have been studied. The analysis of the data was performed self-consistently in terms of two-dimensional Aslamazov-Larkin theory for temperatures above the transition and within the context of the Kosterlitz-Thouless theory at temperatures below the mean-field transition temperature. A quantitative agreement between experimental data and theory was found confirming the picture of a highly two-dimensional behavior of macroscopic fluctuations connected with the superconducting transition in Bi 2Sr 2CaCu 2O 8+δ with no measurable effect of interplane coupling on the in-plane electrical-transport properties.
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