The behavior of the resistivity just below the mean-field transition temperature has been investigated in Bi2Sr2CaCu2O8+$?$ epitaxial films with various oxygen contents. Analysis of the temperature dependence of the resistivity was performed in terms of the Kosterlitz-Thouless charge-unbiding theory and the Ginzburg-Landau Coulomb-gas model for vortex fluctuations. A crossover from two- to three-dimensional vortex configuration was observed as the temperature approaches the Kosterlitz-Thouless transition temperature from above. The carrier mean free path and the effective interplane coupling as well as their dependences on the oxygen content were evaluated.
Scaling behavior of resistivity tails at the edge of superconducting transition in Bi2Sr2CaCu2O8+$?$ epitaxial films
Montuori;
1994
Abstract
The behavior of the resistivity just below the mean-field transition temperature has been investigated in Bi2Sr2CaCu2O8+$?$ epitaxial films with various oxygen contents. Analysis of the temperature dependence of the resistivity was performed in terms of the Kosterlitz-Thouless charge-unbiding theory and the Ginzburg-Landau Coulomb-gas model for vortex fluctuations. A crossover from two- to three-dimensional vortex configuration was observed as the temperature approaches the Kosterlitz-Thouless transition temperature from above. The carrier mean free path and the effective interplane coupling as well as their dependences on the oxygen content were evaluated.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
