Transient Response of Superconducting Tin Microbridges to Supercritical Current Pulses

Abstract

We report on measurements of the transient response of long tin microbridges to current pulses exceeding the critical current. The voltage response was investigated by the use of superconducting sampling and pulse-generation circuits. Analysis of the delay time until the normal state voltage develops gives an estimate of 150 picoseconds for the inelastic electron-phonon scattering time in tin. We have also investigated fast voltage pulses which apparently are induced by the current-driven motion of flux-tubes across the bridges. © 1987 The Japan Society of Applied Physics.