Size effect in circularly symmetric, annular Josephson junctions and the role of an applied magnetic field
- Physics Department, Nanjing University, Nanjing 210008 (China)
- Chinese Center of Advanced Science and Technology (World Laboratory) P.O. Box 8730, Beijing 100080 (China) Department of Physics and The Center of Nonlinear Dynamical System, Nanjing University, Nanjing 210008 (China)
- Department of Physics and The Center of Nonlinear Dynamical System, Nanjing University, Nanjing 210008 (China)
The size effect in circularly symmetric, annular Josephson junctions is discussed in detail. For a junction of width {ital W}, we find that there exists a minimum inner radius {rho}{sub min} for resonant soliton motion within the junction, with respect to the dissipative parameter and external magnetic field, and that the applied magnetic field plays an important role in reducing the size effect ({rho}{sub min} decreases remarkably in the presence of a negative external magnetic field). Because of the size effect, the range of the first current step vanishes if the inner radius of the annular junction is smaller than {rho}{sub min}. A qualitative interpretation is given for the size effect. On the basis of our results, future physical experiments are suggested.
- OSTI ID:
- 6996402
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Vol. 46:18; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
JOSEPHSON JUNCTIONS
MAGNETIC FIELDS
SINE-GORDON EQUATION
ANNULAR SPACE
MAGNETIC FLUX
NONLINEAR PROBLEMS
SOLITONS
CONFIGURATION
EQUATIONS
FIELD EQUATIONS
JUNCTIONS
QUASI PARTICLES
SPACE
SUPERCONDUCTING JUNCTIONS
665411* - Basic Superconductivity Studies- (1992-)
665412 - Superconducting Devices- (1992-)