Abstract
We studied the phase diagram for superconductor-insulator (S-I) transitions in a two-dimensional network of Al/AlO x /Al Josephson junctions by varying the tunneling resistance R n and by varying the junction area of the tunneling junction S from 0.01 µm 2 to 0.09 µm 2 . We observed that the critical tunneling resistance exhibited significant S -dependence and the resultant phase diagram was reminiscent of that of Fazio and Schon's theory. We also observed some differences between the results of theory and experiment at large E J / E C values.
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