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|Type:||Artigo de periódico|
|Title:||Possible Electrical-current-driven Superconductor-insulator Transition|
|Author:||Dos Santos C.A.M.|
|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.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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