Phonon relaxation of subgap levels in superconducting quantum point contacts

Details Phonon relaxation of subgap levels in superconducting quantum point contacts Phonon relaxation of subgap levels in superconducting quantum point contacts

1998-11-12

arxiv.org/abs/cond-mat/9811176v1

JETP Lett. 68, 890 (1998)

Physics

Condensed Matter

Superconductivity

REVTeX, 4 pages

Scientific paper

10.1134/1.567811

Superconducting quantum point contacts are known to possess two subgap states per each propagating mode. In this note we compute the low-temperature relaxation rate of the upper subgap state into the lower one with the emission of an acoustic phonon. If the reflection in the contact is small, the relaxation time may become much longer than the characteristic lifetime of a bulk quasiparticle.

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