title: Enhancement of the supercurrent at a finite voltage in a sandwich-type ballistic SINIS junction.
abstract: A large, reentrant, Josephson current is observed in SINIS (Nb/Al/AlOx/Al/AlOx/Al/Nb) junctions at a finite voltage close to Delta/e (where Delta is the superconducting energy gap in S) and a bias current exceeding the zero-voltage Josephson current. The effect is studied using a multiterminal device configuration. A theoretical interpretation in terms of quantized electron states in the N layer is provided.
authors.affiliation: Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA.
authors.forename: I P
authors.initials: IP
authors.lastname: Nevirkovets
authors.forename: S E
authors.initials: SE
authors.lastname: Shafranjuk
authors.forename: O
authors.initials: O
authors.lastname: Chernyashevskyy
authors.forename: J B
authors.initials: JB
authors.lastname: Ketterson