Abstract
Superconducting tunnel junctions are promising detector elements in next generation x-ray, UV, and optical detectors. Quasiparticles which approach the neighborhood of the normal core may scatter and emit a phonon, thus being trapped in the Abrikosov vortex (AV). In this way the existence of AVs reduces the lifetime of quasiparticles. In this experiment excess quasiparticles in a Nb/AlO𝑥/Nb junction are created by means of a low temperature scanning electron microscope. The trapping rate of quasiparticles into AVs is determined by measuring the quasiparticle lifetime as a function of the AV concentration. This results in an effective trapping radius of the AV of 14.8±1.4nm, which is slightly less than theoretical expectations.
Original language | English |
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Pages (from-to) | 7413-7417 |
Number of pages | 5 |
Journal | Journal of Applied Physics |
Volume | 81 |
Issue number | 11 |
DOIs | |
Publication status | Published - 1997 |
Keywords
- n/a OA procedure