An analysis of the relation between currenthyphen;density distribution and the peak amplitude of Fiske modes in Josephson junctions is presented. It is shown that the peak value can vary through a large range of values, depending on whether the junction is rsquo;rsquo;goodrsquo;rsquo; or rsquo;rsquo;badrsquo;rsquo; in the sense of the uniformity of the oxidation barrier. By a close examination of the Fiske modes, it is possible to determine the barrier uniformity. However, for a nonuniform barrier junction, the currenthyphen;density distribution corresponding to a particular field dependence of Fiske modes is no longer unique. A method of evaluating junctions for use as electronic devices is discussed.
展开▼
