We have investigated the static and dynamic properties of long YBa2Cu3O7 0- Josephson junctions and compared them with those of conventional 0 junctions. Scanning SQUID microscope imaging has revealed the presence of a semifluxon at the phase discontinuity point in 0- Josephson junctions. Zero field steps have been detected in the current-voltage characteristics of all junctions. Comparison with simulation allows us to attribute these steps to fluxons traveling in the junction for conventional 0 junctions and to fluxon-semifluxon interactions in the case of 0- Josephson junctions.
Interplay between Static and Dynamic Properties of Semifluxons in YBa2Cu3O7 0-pi Josephson Junctions / Cedergren, K.; Kirtley, J. R.; Bauch, T.; Rotoli, G.; Troeman, A.; Hilgenkamp, H.; Tafuri, Francesco; Lombardi, F.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 104:(2010), pp. 177003-177006. [10.1103/PhysRevLett.104.177003]
Interplay between Static and Dynamic Properties of Semifluxons in YBa2Cu3O7 0-pi Josephson Junctions
Tafuri, Francesco;
2010
Abstract
We have investigated the static and dynamic properties of long YBa2Cu3O7 0- Josephson junctions and compared them with those of conventional 0 junctions. Scanning SQUID microscope imaging has revealed the presence of a semifluxon at the phase discontinuity point in 0- Josephson junctions. Zero field steps have been detected in the current-voltage characteristics of all junctions. Comparison with simulation allows us to attribute these steps to fluxons traveling in the junction for conventional 0 junctions and to fluxon-semifluxon interactions in the case of 0- Josephson junctions.| File | Dimensione | Formato | |
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