Created-by-current states in long Josephson junctions

Details Created-by-current states in long Josephson junctions Created-by-current states in long Josephson junctions

2007-07-27

arxiv.org/abs/0707.4043v2

Europhys.Lett.83:47008,2008

Physics

Condensed Matter

Superconductivity

7 pages, 8 figures

Scientific paper

10.1209/0295-5075/83/47008

Critical curves "critical current - external magnetic field" of long Josephson junctions with inhomogeneity and variable width are studied. We demonstrate the existence of the regions of magnetic field where some fluxon states are stable only, if the external current through the junction is different from zero. Position and size of such regions depend on length of the junction, its geometry, parameters of inhomogeneity and form of the junction. The noncentral (left and right) pure fluxon states are appeared in the inhomogeneous Josephson junction with increase in the junction length. We demonstrate new bifurcation points with change in width of the inhomogeneity and amplitude of the Josephson current through the inhomogeneity.

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