Title :
Andreev reflection current in clean and one-dimensional Nb short weak links
Author :
Hamasaki, K. ; Abe, H.
Author_Institution :
Dept. of Electr. Eng., Nagaoka Univ. of Technol., Niigato, Japan
fDate :
3/1/1993 12:00:00 AM
Abstract :
Nb-(fine Nb wires)-NbN short weak links (SWLs) have been reproducibly fabricated by the field evaporation technique. By this method, one could continuously vary the I-V curve from insulator type to tunnel-type to metallic-contact type. The quasiparticle characteristics are qualitatively very similar to the prediction of Klapwijk, Blonder, and Tinkham (KBT) theory for the simple case of two independent normal metal-superconductor interfaces in the clean contact limit.<>
Keywords :
Josephson effect; niobium; quasi-particles; superconducting junction devices; type II superconductors; 1D weak links; Andreev reflection current; I-V curve; Nb weak links; Nb-Nb-NbN; clean contact limit; field evaporation technique; normal metal-superconductor interfaces; quasiparticle characteristics; short weak links; Cable insulation; Dielectrics and electrical insulation; Electrons; Equations; Fabrication; Metal-insulator structures; Niobium; Pulse measurements; Quantum mechanics; Reflection;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
