Raman scattering spectra of a superconducting Pb/sub 2/Sr/sub 2/Y/sub 0. 75/Ca/sub 0. 25/Cu/sub 3/O/sub 8+/delta// single crystal
Raman Spectra of a superconducting Pb/sub 2/Sr/sub 2/Y/sub 0.75/Ca/sub 0.25/Cu/sub 3/O/sub 8+/delta// single crystal (/ital T//sub /ital c///approx/20 K) have been measured at different temperatures between 10 and 300 K. Through their polarization properties, the Raman features observed at 90, 150, 240, 430, 480, and 570 cm/sup /minus/1/ are identified as the six /ital A//sub /ital g// modes, while the mode positioned at 325 cm/sup /minus/1/ has /ital B//sub 1/ital g// symmetry. The components of the Raman tensor for these phonons have been determined. The frequencies and assignments obtained here correlate well with lattice-dynamical calculations for Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/. The possible effect of the distortion of the oxygen atom from the ideal rocksalt-type structure of the PbO layers is discussed.
- Research Organization:
- Max-Planck-Institut fur Festkorperforschung, Heisenbergstrasse 1, D-7000 Stuttgart 80, Federal Republic of Germany (DE)
- OSTI ID:
- 5917421
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Vol. 40:4
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CALCIUM OXIDES
RAMAN SPECTRA
COPPER OXIDES
LEAD OXIDES
STRONTIUM OXIDES
YTTRIUM OXIDES
ATOMIC MODELS
LOW TEMPERATURE
MEDIUM TEMPERATURE
MONOCRYSTALS
PHONONS
SUPERCONDUCTORS
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTALS
LEAD COMPOUNDS
MATHEMATICAL MODELS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUASI PARTICLES
SPECTRA
STRONTIUM COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity