Fluxon dynamics in long annular Josephson tunnel junctions | Zendy

Nadia Martucciello | Zendy; J. Mygind | Zendy; V. P. Koshelets | Zendy; А. В. Щукин | Zendy; L. V. Filippenko | Zendy; R. Monaco | Zendy

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Fluxon dynamics in long annular Josephson tunnel junctions

Author(s) -

Nadia Martucciello,

J. Mygind,

V. P. Koshelets,

А. В. Щукин,

L. V. Filippenko,

R. Monaco

Publication year - 1998

Publication title -

physical review. b, condensed matter

Language(s) - English

Resource type - Journals

eISSN - 1095-3795

pISSN - 0163-1829

DOI - 10.1103/physrevb.57.5444

Subject(s) - fluxon , physics , josephson effect , condensed matter physics , magnetic field , radius , superconductivity , penetration depth , josephson energy , pi josephson junction , quantum mechanics , computer security , computer science

Single-fluxon dynamics has been experimentally investigated in high-quality Nb/Al-AlOx /Nb annular Josephson tunnel junctions having a radius much larger than the Josephson penetration depth. Strong evidence of self-field effects is observed. An external magnetic field in the barrier plane acts on the fluxon as a periodic potential and lowers its average speed. Further, the results of perturbative calculations do not fit the experimental current-voltage profile and, provided the temperature is low enough, this profile systematically shows pronounced deviations from the smooth predicted form. The deviations take the form of fine, hysteretic, almost equally spaced structures. @S0163-1829~98!04406-3#

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