Quantum Superconductor-Metal Transition in a Proximity Array
M. V. Feigel'man, A. I. Larkin, M. A. Skvortsov
DOI 10.1103/PhysRevLett.86.1869 · Physical Review Letters
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Abstract
A theory of the zero-temperature superconductor-metal transition is developed for an array of superconductive islands (of size d) coupled via a disordered two-dimensional conductor with the dimensionless conductance g=ħ/e2R□≫1. At T=0 the macroscopically superconductive state of the array with lattice spacing b≫d is destroyed at g<gc≈0.1ln2(b/d). At high temperatures the normal-state resistance between neighboring islands at b=bc is much smaller than RQ=h/4e2.
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