Infrared studies of the normal and superconducting states of Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7/
Journal Article
·
· IBM J. Res. Dev.; (United States)
The authors describe infrared measurements of the a-b-plane response of Y/sub 1/Ba/sub 2/Cu/sub 3/O/sub 7/ crystals with T/sub c/ /approx equal/ 92 K. They observe a self-energy structure at a characteristic energy of 500 cm/sup -1/(8/kappa/T/sub c/), the appearance of which coincides with the transition to the superconducting state. The nature of this self-energy anomaly is consistent with its identification as a nodeless a-b-plane energy gap at 2/Delta/ /approx equal/ 8/kappa/T/sub c/. On the basis of temperature-dependent measurements above T/sub c/, they suggest that the normal state can be primarily characterized by a carrier band with an enhanced low-frequency mass and a frequency-dependent scattering rate. The data indicates that these arise from coupling to an excitation spectrum with characteristic frequencies up to /omega//sub c/ -- 700 cm/sup -1/ and a coupling strength of /lambda/ /approx equal/ 2-3.
- Research Organization:
- International Business Machines Corp., Yorktown Heights, NY (USA). Thomas J. Watson Research Center
- OSTI ID:
- 5709496
- Journal Information:
- IBM J. Res. Dev.; (United States), Journal Name: IBM J. Res. Dev.; (United States) Vol. 33:3; ISSN IBMJA
- Country of Publication:
- United States
- Language:
- English
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·
Fri Mar 31 23:00:00 EST 1989
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·
OSTI ID:6407832
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OSTI ID:6314816
Related Subjects
36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
COUPLING
CRYSTAL STRUCTURE
DATA ANALYSIS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY GAP
FREQUENCY DEPENDENCE
INFRARED SPECTRA
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PHYSICAL PROPERTIES
SCATTERING
SPECTRA
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
COUPLING
CRYSTAL STRUCTURE
DATA ANALYSIS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY GAP
FREQUENCY DEPENDENCE
INFRARED SPECTRA
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PHYSICAL PROPERTIES
SCATTERING
SPECTRA
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES