Josephson junctions with areas of ∼10-9 cm2 and current densities of 105 A/cm2 are described. The junctions were patterned using a combination of optical lithography and oblique evaporation techniques. The junction width is limited by the lithographic resolution to about 1 μm. The junction length is determined essentially by the base-electrode film thickness and can be as small as 1000 Å. The moderate (∼10 Ω) normal resistances of these junctions combined with their short intrinsic RC times gives them potential for application in nonlatching Josephson logic and in quasiparticle mm-wave mixers.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)