Quasiparticle decay effects in the superconducting density of states: Evidence for [ital d]-wave pairing in the cuprates

Journal Article · Mon Mar 08 00:00:00 EST 1993 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.70.1529· OSTI ID:6952707

Coffey, D ^[1]; Coffey, L ^[2]

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1. Center for Materials Science, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
2. 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), Vol. 70:10; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HIGH-TC SUPERCONDUCTORS
ORDER PARAMETERS
D WAVES
DECAY
QUASI PARTICLES
SUPERCONDUCTING JUNCTIONS
TUNNELING
JUNCTIONS
PARTIAL WAVES
SUPERCONDUCTORS
360207* - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)
665411 - Basic Superconductivity Studies- (1992-)