Long Josephson junctions with uniform dc and rf driving currents: General results for the phase-locked regimes

Journal Article · Tue Feb 15 04:00:00 EST 1994 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.356298· OSTI ID:5222099

Cirillo, M; Cocciolo, P; Merlo, V ^[1]; Gronbech-Jensen, N ^[2]; Parmentier, R D ^[3]

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1. Dipartimento di Fisica, Universita di Roma Tor Vergata,'' I-00133 Roma (Italy)
2. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
3. Dipartimento di Fisica, Universita di Salerno, I-84100 Salerno (Italy)

We investigate the dynamics of a long overlap Josephson junction in the presence of constant and sinusoidally time-varying currents on a finite-length spatial interval imposing open circuit boundary conditions at the ends. We scan the behavior of the system in parameter plane regions where the phase locking between the fluxon oscillations in the junction and the external time-varying field is possible. This scanning is performed for different values of the dc driving term and for lengths of the spatial interval ranging from 3.8 up to 15 and dissipation parameters ranging from 0.025 to 0.25. In spite of the complexity of the system and of the broad range of parameters investigated we find that the response to the rf excitation presents general features that can be well understood in terms of current-voltage characteristics of the junctions (and related experimental parameters). The results are compared with a recent theoretical model based on a perturbation approach of the sine-Gordon Hamiltonian.

• OSTI ID: 5222099
• Journal Information: Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 75:4; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CURRENTS
DISSIPATION FACTOR
DYNAMICS
ELECTRIC CURRENTS
ENERGY-LEVEL TRANSITIONS
EXCITATION
JOSEPHSON JUNCTIONS
JUNCTIONS
MAGNETIC FLUX
MECHANICS
OSCILLATIONS
PHASE SHIFT
SUPERCONDUCTING JUNCTIONS