The superconductor insulator transition in systems of ultrasmall grains

Details The superconductor insulator transition in systems of ultrasmall grains The superconductor insulator transition in systems of ultrasmall grains

2001-02-05

arxiv.org/abs/cond-mat/0102067v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

We present transport measurements on quench condensed granular Pb films in which the grains are 40-80\AA in diameter. These films show a cross over from an insulator to a superconductor behavior as the nominal thickness of the layer is increased. This transition is different in nature than those seen in quench condensed systems reported in the past where the films were either uniform or granular with grain sizes on the order of 200\AA . We discuss possible physical mechanisms for these transitions.

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