High-field vortices in Josephson junctions with alternating critical current density

Maayan Moshe*, R. G. Mints

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We study long Josephson junctions with the critical current density alternating along the junction. Equilibrium field-synchronized (FS) states are shown to exist if the applied field is from narrow intervals centered around equidistant series of resonant fields Hm. In the mth FS state, the flux per period of the alternating critical current density i remains constant and is equal to an integer amount of flux quanta, i =m 0. The values of Hm are much higher than the flux penetration field Hs. Two types of single Josephson vortices carrying fluxes 0 or/and 0 2 can exist in the FS states. Specific stepwise resonances in the current-voltage characteristics might be caused by periodic motion of these vortices between the edges of the junction.

Original languageEnglish
Article number140507
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume76
Issue number14
DOIs
StatePublished - 26 Oct 2007

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