Theory of superconductor-insulator transition in single Josephson junctions
arXiv:cond-mat/0202163 · doi:10.1103/PhysRevB.66.012503
Abstract
A non-band theory is developed to describe the superconductor-insulator (SI) transtition in resistively shunted, single Josephson junctions. The characteristic is formulated by a Landauer-like formula and evaluated by the path-integral transfer-matrix method. The result is consistent with the recent experiments at around 80 . However, the insulator phase shrinks with decreasing temperature indicating that the single Josephson junction becomes all superconducting at absolute zero temperature, as long as dissipation is present.
4 pages, 3 figures