A Model Analysis for Current-Voltage Characteristics of Superconducting Weak Links

Abstract

A new phenomenological model for realizing the current-voltage ( I-V ) characteristics of superconducting weak links has been proposed and studied. In this model, the total bias current to the weak link is decomposed in two parts. One part obeys the usual resistively shunted junction (RSJ) type current-voltage relation, and the other obeys the flux-flow (FF) one. It has been shown that the fitting results of the I-V characteristics agree quite well to experimental data. The model and analysis method presented here is quite general, thus the model can be applied to other types of superconducting weak links for both high- and low- T c material.