Volume 83, Number 4, August 2008
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||05 August 2008|
Created-by-current states in long Josephson junctions
JINR - Dubna, Moscow Region, 141980, Russia
2 Sofia University - Sofia, 1164, Bulgaria, EU
3 Tumen Thermal Networks OAO TGK 10 - Tobolsk, 626150, Russia
4 University of Plovdiv - Plovdiv, 4000, Bulgaria, EU
5 Physical Technical Institute - Dushanbe, 734063, Tajikistan
Corresponding author: firstname.lastname@example.org
Accepted: 27 June 2008
Critical curves “critical current-external magnetic field" of long Josephson junctions with inhomogeneity and variable width are studied. We demonstrate the existence of 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 the length of the junction, its geometry, parameters of inhomogeneity and form of the junction. The noncentral (left and right) pure fluxon states appear in the inhomogeneous Josephson junction with the 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.
PACS: 74.50.+r – Tunneling phenomena; point contacts, weak links, Josephson effects / 05.45.-a – Nonlinear dynamics and chaos
© EPLA, 2008
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