IV CHARACTERISTICS OF A CIRCULARLY SYMMETRICAL ANNULAR JOSEPHSON JUNCTION (CSAJJ)-I

The I - V characteristics of a circularly symmetric annular Josephson junction are investigated numerically in this paper. When a d.c. applied field is zero, our I - V characteristic shows no evidence of zero-field steps (ZFS). There does exist an ohmic-relationship in the I - V curve and a simple analytical treatment for this ohmic-behaviour is made by assuming a rotary periodic solution for the equation. However, when a large external magnetic field is applied, the boundary conditions of our equation become asymmetric, which enables 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 (FS). Finally, when the applied external magnetic field is small, we found no Fiske-steps in the I - V curves. © 1990, Elsevier Science Publishers B.V. (North-Holland). All rights reserved.