10.18419/opus-4973
Welte, Michael
Eisenmenger, Wolfgang
Analysis of the phonon spectrum emitted by superconducting Al-tunneling junctions at high quasiparticle injection rates
Universität Stuttgart
1981
Supraleiter , Phonon , Quasiteilchen
530
Universität Stuttgart
Universität Stuttgart
2010-08-09
2016-03-31
2010-08-09
2016-03-31
1981
2013-07-24
en
article
347878423
http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-55759
http://elib.uni-stuttgart.de/handle/11682/4990
The phonon spectrum emitted by superconducting Al-tunneling junctions is analyzed by experiments, in which two junctions of different energy gaps are used as phonon generator and detector. The energy gap of the Al-films is varied by the evaporation conditions. The experiments show clearly that the phonon spectrum and the quasiparticle distributions in the generator are strongly nonthermal and depend markedly on the primary tunneling injection. At high injection rates also significant consequences of gap reductions and instabilities are observed.