Quasiparticle decay effects in the superconducting density of states: Evidence for [ital d]-wave pairing in the cuprates
- Center for Materials Science, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- Department of Physics, Illinois Institute of Technology, Chicago, Illinois 60616 (United States)
Recent tunneling and photoemission data on the cuprate oxide superconductors may provide important information in choosing between proposed models for the superconducting order parameter in these materials. We show that corrections to the weak coupling mean-field approximation for a superconductor lead to different frequency thresholds for the spontaneous decay of the Bogoliubov quasiparticles for different order parameter symmetries and that these effects may be seen in the superconductor-insulator-superconductor tunneling conductance. Comparison with the recent data indicates that a [ital d][sub [ital x]][sup 2][minus][ital y][sup 2], rather than an [ital s]-wave, order parameter is a likely candidate for describing the cuprates.
- OSTI ID:
- 6952707
- Journal Information:
- Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 70:10; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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Cermets
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665411 -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
D WAVES
DECAY
HIGH-TC SUPERCONDUCTORS
JUNCTIONS
ORDER PARAMETERS
PARTIAL WAVES
QUASI PARTICLES
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
TUNNELING