Physics – Condensed Matter – Superconductivity
Scientific paper
2005-08-12
Nature Physics 1, 117 (2005)
Physics
Condensed Matter
Superconductivity
16 + 8 pages. 1 figure, 1 table
Scientific paper
10.1038/nphys154
The dc Josephson effect refers to the dissipationless electrical current -- the supercurrent -- that can be sustained across a weak link connecting two bulk superconductors. This effect is a probe of the fundamental nature of the superconducting state. Here, we analyze the case of two superconducting thin films connected by a point contact. Remarkably, the Josephson effect is absent at nonzero temperature, and the resistance across the contact is nonzero. Moreover, the point contact resistance is found to vary with temperature in a nearly activated fashion, with a UNIVERSAL energy barrier determined only by the superfluid stiffness characterizing the films, an angle characterizing the geometry, and whether or not the Coulomb interaction between Cooper pairs is screened. This behavior reflects the subtle nature of the superconductivity in two-dimensional thin films, and should be testable in detail by future experiments.
Fisher Matthew P. A.
Goldbart Paul M.
Hermele Michael
Refael Gil
No associations
LandOfFree
Fate of the Josephson effect in thin-film superconductors does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Fate of the Josephson effect in thin-film superconductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fate of the Josephson effect in thin-film superconductors will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-37951