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- W2006156934 abstract "The I-V characteristics of a circularly symmetric annular Josephson junction are investigated numerically in this paper. By assuming a soliton solution in the junction initially, we found that in the absence of both an applied magnetic field and a feeding current there exists a quasisoliton solution for the equation ${mathrm{ensuremath{varphi}}}_{mathrm{ensuremath{rho}}mathrm{ensuremath{rho}}}$+${mathrm{ensuremath{rho}}}^{mathrm{ensuremath{-}}1}$${mathrm{ensuremath{varphi}}}_{mathrm{ensuremath{rho}}}$-${mathrm{ensuremath{varphi}}}_{mathit{t}mathit{t}}$-ensuremath{alpha}${mathrm{ensuremath{varphi}}}_{mathit{t}}$=sinensuremath{varphi} so long as dissipative effects are excluded (i.e., ensuremath{alpha}=0). In the presence of the dissipative term (ensuremath{alpha}ensuremath{ne}0), such a quasisoliton solution does not exist. When a dc feeding current is introduced but the applied magnetic field is zero, the I-V characteristics show no evidence of zero-field steps. There does exist an Ohmic relationship in the I-V curve and a simple analytical treatment for this Ohmic behavior is made by assuming a rotary periodic solution for the equation. However, when a large external magnetic field is applied, the boundary conditions of this equation become asymmetric, which allows fluxon resonant propagation to occur within the junction. Hence we obtain a step-shaped I-V curve and these are considered to be Fiske steps. Finally, when the applied external magnetic field is small, we found no Fiske steps in the I-V curves." @default.
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- W2006156934 title "I-Vcharacteristics of a circularly symmetric annular Josephson junction" @default.
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- W2006156934 doi "https://doi.org/10.1103/physrevb.43.2756" @default.
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