Manipulating Josephson junctions in thin-films by nearby vortices

• Published in: Physica. C, Superconductivity Vol. 502; pp. 58 - 62
• Main Authors: Kogan, V.G., Mints, R.G.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.07.2014; Elsevier
• Subjects: abrikosov vortex, Josephson junctions, thin films, vortices; Banks; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Fluid flow; Josephson junctions; MATERIALS SCIENCE; Physics; Position (location); Proximity effects, weak links, tunneling phenomena, and josephson effects, adreev effect, sn and sns junctions; Separation; Strip; Superconductivity; Thin films; Vortices; Thin films; Josephson junctions; vortices; Superconducting thin films; Critical current; Josephson effect; Vortices; Positions; Thin films vortices
• ISSN: 0921-4534; 1873-2143
• DOI: 10.1016/j.physc.2014.04.039

•Vortex located in a bank of a planar Josephson junction changes its character.•Vortex located at some discreet positions in thin strip bank suppresses to zero the zero-field current.•The number of these positions is equal to the number of vortices trapped.•Critical current-field patterns are strongly affected by the vortex position. It is shown that a vortex trapped in one of the banks of a planar edge-type Josephson junction in a narrow thin-film superconducting strip can change drastically the dependence of the junction critical current on the applied field, Ic(H). When the vortex is placed at certain discrete positions in the strip middle, the pattern Ic(H) has zero at H=0 instead of the traditional maximum of ‘0-type’ junctions. The number of these positions is equal to the number of vortices trapped at the same location. When the junction–vortex separation exceeds ∼W, the strip width, Ic(H) is no longer sensitive to the vortex presence. The same is true for any separation if the vortex approaches the strip edges.