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Type: Artigo de periódico
Title: Possible Electrical-current-driven Superconductor-insulator Transition
Author: Dos Santos C.A.M.
Kopelevich Y.
Moehlecke S.
Machado A.J.S.
Abstract: In this work we have studied the effect of applied electrical current on the resistive behavior of single phase Y1-XPrxBa2Cu3O7-Y [Y(Pr)123] polycrystalline samples with x close to the critical Pr concentration Xc ≈ 0.57 above which the superconductivity vanishes. The obtained results suggest the occurrence of a superconductinginsulator transition (SIT) driven by the electrical current. In particular, a crossing of current-voltage (I-V) isotherms at magnetic-field-dependent current Ic(H) is found, and the scaling behavior of nonlinear resistance R(I,T) = V(T)/I similar to that predicted in the scaling theory of SIT is obtained. We speculate that this possible current-induced SIT can be considered as the dynamical counterpart of the magnetic-field-tuned SIT. © 2000 Elsevier Science B.V. All rights reserved.
Rights: fechado
Identifier DOI: 
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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