Fluxon dynamics in long annular Josephson tunnel junctions

N. Martucciello; Jesper Mygind; V.P. Koshelets; A.V. Shchukin; L. Filippenko; R Monaco

doi:10.1103/PhysRevB.57.5444

Fluxon dynamics in long annular Josephson tunnel junctions

N. Martucciello, Jesper Mygind, V.P. Koshelets, A.V. Shchukin, L. Filippenko, R Monaco

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Abstract

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.

Original language	English
Journal	Physical Review B
Volume	57
Issue number	9
Pages (from-to)	5444-5449
ISSN	2469-9950
DOIs	https://doi.org/10.1103/PhysRevB.57.5444
Publication status	Published - 1998

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Copyright (1998) by the American Physical Society.

Keywords

MAGNETIC-FIELD

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title = "Fluxon dynamics in long annular Josephson tunnel junctions",

abstract = "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.",

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AU - Mygind, Jesper

AU - Koshelets, V.P.

AU - Shchukin, A.V.

AU - Filippenko, L.

AU - Monaco, R

PY - 1998

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AB - 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.

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Fluxon dynamics in long annular Josephson tunnel junctions

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Bibliographical note

Keywords

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