Quasiparticle trapping and the quasiparticle multiplier
- 2 February 1987
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 50 (5), 293-295
- https://doi.org/10.1063/1.98229
Abstract
Superconductors and in particular superconducting tunnel junctions can be used to detect phonons, electromagnetic radiation, x rays, and nuclear particles by the mechanism of Cooper-pair breaking to produce excess quasiparticles and phonons. We show that the sensitivity can be increased by a factor of 100 or more by trapping the quasiparticles in another superconductor of lower gap in the region of the tunnel junction. Moreover, if the ratio of the gap energies is >3 a multiplication process can occur due to the interaction of the relaxation phonons. This leads to the concept of the quasiparticle multiplier, a device which could have wider applications than the Gray effect transistor or the quiteron.Keywords
This publication has 17 references indexed in Scilit:
- High quality all refractory Josephson tunnel junctions for SQUID applicationsIEEE Transactions on Magnetics, 1985
- QuiteronIEEE Transactions on Magnetics, 1983
- Measurement of phonon lifetimes in bulk superconducting tinPhysical Review B, 1981
- Quasiparticle relaxation times in clean Al filmsPhysical Review B, 1981
- Quasiparticle branch mixing rates in superconducting aluminumPhysical Review B, 1979
- Erratum: Quasiparticle and phonon lifetimes in superconductorsPhysical Review B, 1977
- Kinetic-equation approach to nonequilibrium superconductivityPhysical Review B, 1977
- Quasiparticle and phonon lifetimes in superconductorsPhysical Review B, 1976
- The dynamics of superconducting phonon devicesJournal of Physics C: Solid State Physics, 1976
- The attenuation of high frequency phonons in metalsJournal of Physics F: Metal Physics, 1973