Abstract
We have studied the temperature and field dependencies of the critical current in the Josephson junction with a tunneling barrier formed by a paramagnetic insulator. We demonstrate that in these junctions coexistence of both the 0 and the states within one tunnel junction occurs, and leads to the appearance of a sharp cusp in the temperature dependence , similar to the cusp found for the transition in metallic junctions. This cusp is not related to the temperature-induced transition itself, but is caused by the different temperature dependencies of the opposing 0 and supercurrents through the barrier.
- Received 29 May 2006
DOI:https://doi.org/10.1103/PhysRevB.74.020502
©2006 American Physical Society