NB/AL/ALOX/NB STACKED LONG JOSEPHSON-JUNCTIONS
|Title||NB/AL/ALOX/NB STACKED LONG JOSEPHSON-JUNCTIONS|
|Publication Type||Conference Proceedings|
|Year of Publication||1993|
|Authors||Barbara, P., Costabile G., Mygind J., and Pedersen N. F.|
|Conference Name||20th International Conference on Low Temperature Physics|
|Conference Location||Eugene, Or|
We have fabricated and tested Josephson tunneling structures made of two stacked Nb/Al/AlOx/Nb long junctions in which the thickness of the intermediate electrode is less than lambda(L). We report the observation of two phenomena: a considerable decrease of the Swihart velocity and a small but finite voltage jump of the quasiparticle voltage of one junction whenever the other one switches from the superconducting state to the normal state or between dynamical states.