Determination of the superconducting gap in R Ba sub 2 Cu sub 3 O sub 7 minus. delta
Journal Article
·
· Physical Review Letters; (USA)
- Max-Planck-Institut fuer Festkoerperforschung, Stuttgart (Federal Republic of Germany)
The anomalous broadening of the {ital B}{sub 1{ital g}}-like phonon of {ital R}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} observed in Raman scattering is studied as a function of phonon frequency by substituting various rare earths for {ital R}. The onset of broadening starts abruptly at a phonon energy which allows us to unambiguously determine a single, sharp superconducting gap at 2{Delta}=316 cm{sup {minus}1}. 2{Delta}/{ital kT}{sub {ital c}}=4.95{plus minus}0.10, i.e., {ital R}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} is a strong-coupling superconductor. We find qualitative and quantitative agreement with theory.
- OSTI ID:
- 6520625
- Journal Information:
- Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 65:7; ISSN PRLTA; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DATA
DYSPROSIUM COMPOUNDS
DYSPROSIUM OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY
ERBIUM COMPOUNDS
ERBIUM OXIDES
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
EXPERIMENTAL DATA
FLUCTUATIONS
FREQUENCY DEPENDENCE
HIGH-TC SUPERCONDUCTORS
INFORMATION
LINE BROADENING
LOW TEMPERATURE
MEDIUM TEMPERATURE
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHONONS
PHYSICAL PROPERTIES
QUASI PARTICLES
RAMAN EFFECT
RARE EARTH COMPOUNDS
SELF-ENERGY
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THULIUM COMPOUNDS
THULIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE
VARIATIONS
VERY LOW TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DATA
DYSPROSIUM COMPOUNDS
DYSPROSIUM OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY
ERBIUM COMPOUNDS
ERBIUM OXIDES
EUROPIUM COMPOUNDS
EUROPIUM OXIDES
EXPERIMENTAL DATA
FLUCTUATIONS
FREQUENCY DEPENDENCE
HIGH-TC SUPERCONDUCTORS
INFORMATION
LINE BROADENING
LOW TEMPERATURE
MEDIUM TEMPERATURE
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHONONS
PHYSICAL PROPERTIES
QUASI PARTICLES
RAMAN EFFECT
RARE EARTH COMPOUNDS
SELF-ENERGY
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THULIUM COMPOUNDS
THULIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE
VARIATIONS
VERY LOW TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES