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Author Carr, G. L. ♦ Lobo, R. P. S. M. ♦ LaVeigne, J. ♦ Reitze, D. H. ♦ Tanner, D. B.
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword PARTICLE ACCELERATORS ♦ COOPER PAIRS ♦ DECAY ♦ ENERGY GAP ♦ RECOMBINATION ♦ RELAXATION ♦ SPECTROSCOPY ♦ SUPERCONDUCTORS ♦ SYNCHROTRONS ♦ TEMPERATURE DEPENDENCE ♦ TRANSPORT
Abstract We have examined the recombination of excess quasiparticles in superconducting Pb by time-resolved far-infrared spectroscopy using a pulsed synchrotron source. The energy gap shift calculated by Owen and Scalapino [Phys. Rev. Lett. 28, 1559 (1972)] is directly observed, as is the associated reduction in the Cooper pair density. The relaxation process involves a two-component decay; the faster ({approx}200 ps) is associated with the actual (effective) recombination process, while the slower ({approx}10 to 100ns) is due to heat transport across the film/substrate interface. The temperature dependence of the recombination process between 0.5T{sub c} and 0.85T{sub c} is in good agreement with theory.
ISSN 00319007
Educational Use Research
Learning Resource Type Article
Publisher Date 2000-10-02
Publisher Place United States
Journal Physical Review Letters
Volume Number 85
Issue Number 14


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