Current-Induced Superconductor-Insulator Transition in Granular High-Tc Superconductors
Y. Kopelevich, C. A. M. dos Santos, S. Moehlecke, A. J. S. Machado
Abstract
In this work we report a systematic study of electrical current effects on superconducting properties of granular Y1-xPrxBa2Cu3O7-δ samples with x close to the critical Pr concentration above which the superconductivity vanishes. The results indicate the occurrence of superconductor-insulator quantum phase transition (SIT) driven by the applied electrical current, and suggest that the current-induced SIT can be considered as the dynamical counterpart of the magnetic-field- tuned SIT.
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