ac-induced damping of a fluxon in a long Josephson junction
M. V. Fistul, E. Goldobin, A. V. Ustinov
DOI 10.1103/PhysRevB.64.092501 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We present a theoretical and experimental study of Josephson vortex (fluxon) moving in the presence of spatially homogeneous dc and ac bias currents. By mapping this problem to the problem of calculating the current-voltage characteristic of a small Josephson junction, we derive the dependence of the average fluxon velocity u on the dc bias current γ. In particular we find that the low frequency ac bias current results in an additional nonlinear damping of fluxon motion. Such ac induced damping crucially depends on the intrinsic damping parameter α and increases drastically as α is reduced. We find a good agreement of the analysis with both the direct numerical simulations and the experimentally measured γ(u) curves of a long annular Josephson junction with one trapped fluxon.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb/Al-AlOx/Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Quantum and classical resonant escapes of a strongly driven Josephson junction
similarity 0.96H. F. Yu et al.
Source status unknown — claims are unverified
Flux pinning in large Josephson junctions with columnar defects
similarity 0.95M. A. Itzler & M. Tinkham
Source status unknown — claims are unverified
Dynamic behavior of Josephson-coupled layered structures
similarity 0.95R. Kleiner et al.
Source status unknown — claims are unverified
Quantum escape of the phase in a strongly driven Josephson junction
similarity 0.95M. V. Fistul et al.
Source status unknown — claims are unverified
Vortex pinning by disordered columnar defects in large Josephson junctions
similarity 0.94M. A. Itzler & M. Tinkham
Source status unknown — claims are unverified
Magnetic flux quanta in annular Josephson junctions in a barrier-parallel de magnetic field
similarity 0.94S. Keil et al.
Source status unknown — claims are unverified