Phonon Raman scattering of NbBa sub 2 Cu sub 3 O sub y and Nd sub 1. 6 Ba sub 1. 4 Cu sub 3 O sub y
- Superconductivity Research Laboratory, International Superconductivity Technical Center, Tokyo 135, Japan (JP)
Polarized Raman scattering from NdBa{sub 2}Cu{sub 3}O{sub {ital y}} and Nd{sub 1.6}Ba{sub 1.4}Cu{sub 3}O{sub {ital y}} single crystals is reported. Single-phonon peaks have been observed in NdBa{sub 2}Cu{sub 3}O{sub {ital y}} at 136, 168, 316, 448, 508, and 580 cm{sup {minus}1} at room temperature where the 316- and 580-cm{sup {minus}1} peaks are strong in the ({ital x},{ital x}) while the 448- and 508-cm{sup {minus}1} peaks are strong in the ({ital z},{ital z}) configurations. The 316-cm{sup {minus}1} peak is found to separate into two peaks at 290 and 323 cm{sup {minus}1} at 4 K, which are assigned as in-phase and out-of-phase vibration of oxygen atoms in the Cu-O plane, respectively. The polarization dependence of the scattering peaks has been explained on the basis of the characteristics of the electronic transitions. The energy shift of peaks when Ba is substituted by Nd has also been discussed.
- OSTI ID:
- 6846785
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Vol. 41:16; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
RAMAN SPECTRA
COPPER OXIDES
NEODYMIUM OXIDES
AMBIENT TEMPERATURE
ELECTRON-PHONON COUPLING
HIGH-TC SUPERCONDUCTORS
PHONONS
POLARIZATION
TYPE-II SUPERCONDUCTORS
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
NEODYMIUM COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
QUASI PARTICLES
RARE EARTH COMPOUNDS
SPECTRA
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
656100* - Condensed Matter Physics- Superconductivity
656003 - Condensed Matter Physics- Interactions between Beams & Condensed Matter- (1987-)