Quantum fluctuations and the onset of global superconductivity in disordered Josephson-junction arrays
Jayanta K. Bhattacharjee, Richard A. Ferrell, Behzad Mirhashem
DOI 10.1103/PhysRevB.41.11615 · Physical Review B
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Abstract
The measured normal-state resistance threshold for the onset of global superconductivity is calculated, in the mean-field approximation, for a Josephson-junction array in which the normal-state junction resistances and, hence, also the Josephson coupling energies, are weakly disordered. Such disorder increases the threshold by a nonuniversal factor which depends on the width of the junction conductance distribution and the lattice coordination number.
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