Effects of nonequilibrium quasiparticles on characteristics of Nb/AlOx/Nb/n-InSb triodes

Publisher Website
Google Scholar
Abstract
A triode with a Nb/AlOx/Nb Josephson junction emitter and an n‐InSb collector was fabricated and tested. The base layer was superconducting Nb film. The collector current of the triode was controlled by the injection of low‐energy quasiparticles with an energy near the gap energy of the base layer. Common‐base small‐signal current gain was 10−3 to about 0.1 at 1.7 K. The characteristics of the triode were calculated. The analysis used a model where the collector‐base junction is treated as a tunnel junction, and the quasiparticle density was calculated by using the rate equations given by Rothwarf and Taylor [Phys. Rev. Lett. 1 9, 27 (1967)]. The calculated characteristics agreed qualitatively with the measured results.

This publication has 19 references indexed in Scilit: