Voltage splay modes and enhanced phase locking in a modified linear Josephson array
- Department of Physics, Ohio State University, Columbus, Ohio 43210 (United States)
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=(1)/(2), where f is the magnetic frustration, while for 0{lt}f{lt}(1)/(2), a voltage wave propagates along the array with a phase velocity v{sub p}(f)=2aV{sub dc}/{Phi}{sub 0}(1{minus}2f). The locked splay modes are found to be tolerant of critical current disorder approaching 100{percent}. 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/N{sup 2} dependence, N being the number of series-connected junctions. {copyright} {ital 1996} {ital The American Physical Society}
- Research Organization:
- Purdue Univ., West Lafayette, IN (United States)
- DOE Contract Number:
- FG02-90ER45427
- OSTI ID:
- 450393
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 55, Issue 6; Other Information: PBD: Feb 1997
- Country of Publication:
- United States
- Language:
- English
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