Voltage splay modes and enhanced phase locking in a modified linear Josephson array

E. B. Harris; J. C. Garland

doi:10.1103/PhysRevB.55.3832

← Back to search

Voltage splay modes and enhanced phase locking in a modified linear Josephson array

E. B. Harris, J. C. Garland

DOI 10.1103/PhysRevB.55.3832 · Physical Review B

T1

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 analyze a modified linear Josephson-junction array in which additional unbiased junctions are used to greatly enhance phase locking. This geometry exhibits strong correlated behavior, with an external magnetic field tuning the voltage splay angle between adjacent Josephson oscillators. The array displays a coherent in-phase mode for f=, where f is the magnetic frustration, while for 0vp (f )=2aVdc /Φ0 (1-2 f ). The locked splay modes are found to be tolerant of critical current disorder approaching 100%. The stability of the array has also been studied by computing Floquet exponents. These exponents are found to be negative for all array lengths, with a 1/N2 dependence, N being the number of series-connected junctions.