Phonon and quasiparticle dynamics in superconducting aluminum tunnel junctions

Journal Article · Sun Nov 30 23:00:00 EST 1975 · Phys. Rev. Lett., v. 35, no. 23, pp. 1597-1600

DOI:https://doi.org/10.1103/PhysRevLett.35.1597· OSTI ID:4107397

Smith, L N; Mochel, J M

The effect of the 2$delta$ recombination phonons in modifying the effective lifetime tau/sub eff/ for quasiparticle recombination was determined for the first time in a double-junction experiment by comparing measurements taken both with and without a helium film covering the junctions. For a double junction made from evaporated aluminum films 300 A thick deposited on a glass substrate, it was found that tau/sub eff//tau/sub R/=8.6 plus-or-minus 1.1 in the absence of the helium film, and, at $delta$/kT=6, tau/sub R/=1.4 plus-or-minus 0.1 $mu$sec. (AIP)

• Research Organization: Department of Physics and Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801
• Sponsoring Organization: USDOE
• NSA Number: NSA-33-017011
• OSTI ID: 4107397
• Journal Information: Phys. Rev. Lett., v. 35, no. 23, pp. 1597-1600, Journal Name: Phys. Rev. Lett., v. 35, no. 23, pp. 1597-1600; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

*SUPERCONDUCTING JUNCTIONS-- QUASI PARTICLES
420201* --Engineering--Facilities & Equipment--Cryogenic & Superconducting Equipment & Devices
ALUMINIUM
FILMS
HELIUM
N42220* --Engineering--Facilities & Equipment--Cryogenic & Superconducting Equipment & Devices
RECOMBINATION
TUNNEL EFFECT