Phonon spectrum and the elastic constants of high T/sub c/Ba/sub 2/YCu/sub 3/O/sub 7/
Journal Article
·
· Mod. Phys. Letters B; (United States)
The phonon spectrum and the elastic constants of high superconducting transition temperature compound Ba/sub 2/YCu/sub 3/O/sub 7/ have been investigated in both the tetragonal and the orthorhombic phases using an angular force model. The zone centre phonons agree well with the Raman and the infra-red measurements in the case of tetragonal phase as compared to the orthorhombic one. The acoustical phonons exhibit phonon anomalies in both the tetragonal and the orthorhombic structures. Number of optical phonons do not show dispersion in (ooq) direction indicating strong 2-dimensional features. The relevance of the phonons to the high temperature superconductivity is discussed. The elastic constants do not indicate anisotropy in either of the tetragonal or the orthorhombic phases.
- Research Organization:
- Indian Inst. of Tech., New Delhi (India). Dept. of Physics
- OSTI ID:
- 5709632
- Journal Information:
- Mod. Phys. Letters B; (United States), Journal Name: Mod. Phys. Letters B; (United States) Vol. 2:6; ISSN MPLBE
- Country of Publication:
- United States
- Language:
- English
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Conference
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Wed Jul 01 00:00:00 EDT 1987
· Advanced Ceramic Materials; (USA)
·
OSTI ID:5124194
Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
656003 -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
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
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELASTICITY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
INFRARED SPECTRA
MECHANICAL PROPERTIES
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN COMPOUNDS
PHONONS
PHYSICAL PROPERTIES
QUASI PARTICLES
RAMAN SPECTRA
SPECTRA
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TENSILE PROPERTIES
TETRAGONAL LATTICES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
656003 -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
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
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELASTICITY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
INFRARED SPECTRA
MECHANICAL PROPERTIES
ORTHORHOMBIC LATTICES
OXIDES
OXYGEN COMPOUNDS
PHONONS
PHYSICAL PROPERTIES
QUASI PARTICLES
RAMAN SPECTRA
SPECTRA
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TENSILE PROPERTIES
TETRAGONAL LATTICES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES