Abstract
We study a highly disordered network of superconducting granules linked by weak Josephson junctions in a magnetic field and develop a mean field theory for this problem. The diamagnetic response to a slow variations of magnetic field is found to be analogous to the response of a type-II superconductor with extremely strong pinning. We calculate an effective penetration depth and critical current and find that both and are nonzero but are strongly suppressed by frustration.
- Received 23 May 1994
DOI:https://doi.org/10.1103/PhysRevLett.74.3447
©1995 American Physical Society