Circular and Annular Two-Dimensional Josephson Junction: Statics and Dynamics
| Autor: | T. Nikiciuk, R. Pawlikowski, J. Zagrodziński |
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| Rok vydání: | 2004 |
| Předmět: |
Josephson effect
Physics Physics and Astronomy (miscellaneous) Condensed matter physics Fluxon sine-Gordon equation Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Electronic Optical and Magnetic Materials Magnetic field Cross section (physics) Planar Condensed Matter::Superconductivity Boundary value problem Statics |
| Zdroj: | Journal of Superconductivity. 17:329-338 |
| ISSN: | 0896-1107 |
| DOI: | 10.1023/b:josc.0000034254.34981.d9 |
| Popis: | We present the results of the numerical analysis of circular and annular two-dimensional planar Josephson junctions. The static and dynamical states of a junction with or without an externally applied uniform magnetic field have been investigated. Our model is based on the assumption that junction electrodes are sufficiently long and have a uniform cross section. Such a configuration allows to find analytically and numerically the boundary conditions, which are given by the surface current distribution on the electrodes. We found static and dynamical states of a large-area two-dimensional junction and present some of the resulting patterns. Surprisingly, in contrast to a circular one-dimensional structure (ring), we found that in a circular or annular large-area junction, the fluxons circulating along the junction border do not exist. The boundary conditions play an essential role and determine the trajectory of fluxons. Finally, we analyze a junction surrounding a current-carrying wire. |
| Databáze: | OpenAIRE |
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