Evidence for Two Time Scales in Long SNS Junctions
Evidence for Two Time Scales in Long SNS Junctions
We use microwave excitation to elucidate the dynamics of long superconductor--normal metal--superconductor Josephson junctions. By varying the excitation frequency in the range 10 MHz--40 GHz, we observe that the critical and retrapping currents, deduced from the dc voltage versus dc current characteristics of the junction, are set by two different …