Infrared evidence for gap anisotropy in YBa sub 2 Cu sub 3 O sub 7
Journal Article
·
· Physical Review Letters; (USA)
- IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598 (US)
Infrared reflectivity measurements of crystalline YBa{sub 2}Cu{sub 3}O{sub 7} ({ital T}{sub {ital c}}{congruent}92 K) are performed with the electric field both parallel and perpendicular to the Cu-O planes. We find evidence for an unusually large in-plane energy gap ({similar to}8{ital kT}{sub {ital c}}), while a much smaller energy scale ({similar to}3{ital kT}{sub {ital c}}) is obtained with the field perpendicular to the planes suggesting substantial gap anisotropy. Temperature-dependent measurements near {ital T}{sub {ital c}} demonstrate a clear relationship between the development of the {similar to}8{ital kT}{sub {ital c}} feature and the superconducting transition.
- OSTI ID:
- 5485337
- Journal Information:
- Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 63:4; ISSN PRLTA; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Journal Article
·
Fri Jun 01 00:00:00 EDT 1990
· Physical Review, B: Condensed Matter; (USA)
·
OSTI ID:6815683
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Journal Article
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Mon Aug 06 00:00:00 EDT 1990
· Physical Review Letters; (USA)
·
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Anisotropy of the critical current density in epitaxial YBa sub 2 Cu sub 3 O sub x films
Journal Article
·
Sun Jan 21 23:00:00 EST 1990
· Physical Review Letters; (USA)
·
OSTI ID:7008612
Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC FIELDS
ENERGY GAP
INCIDENCE ANGLE
INFRARED SPECTRA
LOW TEMPERATURE
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REFLECTIVITY
SPECTRA
SUPERCONDUCTORS
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
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
ELECTRIC FIELDS
ENERGY GAP
INCIDENCE ANGLE
INFRARED SPECTRA
LOW TEMPERATURE
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REFLECTIVITY
SPECTRA
SUPERCONDUCTORS
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VERY LOW TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES