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Coupled fluxon modes in stacked Nb/AiOx/Nb long Josephson junctions

Ustinov, A. V.; Kohlstedt, H.; Cirillo, M.; Pedersen, N. F.; Hallmanns, G.; Heiden, C.

The current-voltage characteristics of N vertically stacked Nb-based long Josephson junctions (N=1,2,3) are measured. For a single junction in the stack, we observe the splitting of the flux-flow mode into M modes, each of them being characterized by different magnetic field dependence and by different cavity-resonance (Fiske-mode) frequency. Our results suggest that a fluxon moving in one junction in the stack may experience M=N different Swihart velocities due to the coupling to adjacent junction(s) through the common electrode(s) of the thickness smaller than the London penetration depth. In the twofold stacks, we find an indication for a coherent mode corresponding to coupled fluxon arrays moving in both junctions.

DOI: 10.1103/PhysRevB.48.10614
Zitationen: 98
Web of Science
Zitationen: 106
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 10.1993
Sprache Englisch
Identifikator ISSN: 0163-1829, 0556-2805, 1094-1622, 1095-3795, 1098-0121, 1550-235X, 2469-9950, 2469-9969
KITopen-ID: 1000077339
Erschienen in Physical review / B
Verlag American Physical Society (APS)
Band 48
Heft 14
Seiten 10614-10617
Nachgewiesen in Scopus
Web of Science
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