Self-generated flux in Josephson junctions with alternating critical current density
Abstract
We study an interesting state with a self-generated magnetic flux in a long Josephson junction. The critical current density jc is assumed to alternate randomly along the tunnel contact on a length scale much less than the local Josephson penetration depth. The phase difference is then a sum of an alternating term and a smooth term which self-consistently contribute to the formation of a stationary state with self-generated flux. Two types of Josephson vortices are found in this state, one with magnetic flux Φ1<Φ0/2 and another one with magnetic flux Φ2=Φ0-Φ1>Φ0/2.
- Publication:
-
Physical Review B
- Pub Date:
- February 1998
- DOI:
- 10.1103/PhysRevB.57.R3221
- Bibcode:
- 1998PhRvB..57.3221M
- Keywords:
-
- 74.25.Nf;
- 74.60.Ge;
- Response to electromagnetic fields