NONLINEAR MICROWAVE-ABSORPTION IN WEAK-LINK JOSEPHSON-JUNCTIONS

A model, based on the resistively shunted junction theory, is develope d can used to study microwave absorption in weak-link Josephson juncti ons in high-T-c superconductors. Both linear and nonlinear cases of mi crowave absorption in Josephson junctions are analyzed. A comparison o f the model with microwave absorption loop theory is presented along w ith a general condition for the applicability of both models. The nonl inear case was solved numerically and the threshold points of sharp mi crowave absorption are presented. At these points, a 2 pi dynamic quan tization is the key to the interpretation of nonlinear microwave absor ption data. The nonlinear microwave absorption model is extended to th e study of nonuniformly coupled junctions, and a general statement for the applicability of such a model is presented.