|
||||||||||||||||||
Quantum superconductor-metal transition in a proximity arraya Landau Institute for Theoretical Physics, Russian Academy of Sciences, prosp. Akademika Semenova 1A, Chernogolovka, Moscow Region, 142432, Russian Federation b William I. Fine Theoretical Physics Institute, University of Minnesota, Minnesota, Minnesota , United States of America 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 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.
|
||||||||||||||||||
|