Static semifluxons in a long Josephson junction with $\pi$-discontinuity points


Susanto, H. and Gils, S.A. van and Visser, T.P.P. and Ariando and Smilde, H.J.H. and Hilgenkamp, H. (2003) Static semifluxons in a long Josephson junction with $\pi$-discontinuity points. Physical Review B: Condensed matter and materials physics, 68 (10). p. 104501. ISSN 1098-0121

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Abstract:We investigate analytically a long Josephson junction with several $\pi$-discontinuity points characterized by a jump of $\pi$ in the phase difference of the junction. The system is described by a perturbed-combined sine-Gordon equation. Via phase-portrait analysis, it is shown how the existence of static semifluxons localized around the discontinuity points is influenced by the applied bias current. In junctions with more than one corner, there is a minimum-facet-length for semifluxons to be spontaneously generated. A stability analysis is used to obtain the minimum-facet-length for multicorner junctions.

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Copyright:© 2003 American Physical Society
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