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VOLUME 73 (2001) | ISSUE 3 | PAGE 148
Width of the zero-field superconducting resistive transition in the vicinity of the localization threshold
PACS: 71.30.+h, 74.25.-q, 75.40.+k
Abstract
Resistive superconducting zero-field transition in amorphous In-O films in states from the vicinity of the insulator-superconductor transition is analyzed in terms of two characteristic temperatures: the upper one, Tc0, where the finite amplitude of the order parameter is established and the lower one, Tc, where the phase ordering takes place. It follows from the magnetoresistance measurements that the resistance in between, Tc<T<Tc0, cannot be ascribed to dissipation by thermally dissociated vortex pairs. So, it is not Kosterlitz-Thouless-Berezinskii transition that happens at Tc.