INTERPRETATION OF DC CURRENT-VOLTAGE CHARACTERISTICS OF TA(FOIL)AL-O-X-AL TUNNEL-JUNCTIONS ON THE BASIS OF A MODIFIED MCMILLANS MODEL OF THE PROXIMITY EFFECT
C. Patel et al., INTERPRETATION OF DC CURRENT-VOLTAGE CHARACTERISTICS OF TA(FOIL)AL-O-X-AL TUNNEL-JUNCTIONS ON THE BASIS OF A MODIFIED MCMILLANS MODEL OF THE PROXIMITY EFFECT, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 370(1), 1996, pp. 112-114
Al-O-x-Al superconducting tunnel junctions (STJs) have been photolitho
graphically fabricated on a 350 micron thick Ta foil to investigate th
e properties of the Al quasiparticle trap. The measured current-voltag
e (I-V) characteristics are shown to be reasonably well fitted by usin
g modified densities of states generated by McMillan's model of the pr
oximity effect and by assuming a 24% normal metal component in the bas
e Ta(foil)Al electrode.