Published July 1, 1988
| Version v1
Journal article
Evidence for anisotropic excitonlike enhancement of the Raman scattering from La2CuO4
- 1. Research Staff, Ford Motor Company, Dearborn, Michigan 48121
Description
Polarized Raman studies on oriented single crystals of La2CuO4 yield α/sub z//sub z/ spectra with narrow lines at 429 and 228 cm/sup -1/ that are identified as the two A1/sub g/ modes expected for the tetragonal K2NiF4 structure; α/sub x//sub z/ spectra with one line at 228 cm/sup -1/ that has E/sub g/ symmetry; and α/sub x//sub x/ spectra with numerous peaks that are due to normally forbidden phonon excitations. The α/sub x//sub x/ spectra also show strong second-order features, suggesting a highly anisotropic, excitonlike enhancement of the Raman scattering
Additional details
Publishing Information
- Journal Title
- Phys. Rev., B: Condens. Matter
- Journal Volume
- 38
- Journal Issue
- 1
- Series
- Phys. Rev., B: Condens. Matter.
- Journal Page Range
- 917-920
- ISSN
- 0163-1829
- CODEN
- PRBMD
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 19087637
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ANISOTROPY; COPPER OXIDES; LANTHANUM OXIDES; MONOCRYSTALS; PHONONS; POLARIZATION; RAMAN SPECTRA; TETRAGONAL LATTICES
- Descriptors DEC
- CHALCOGENIDES; COPPER COMPOUNDS; CRYSTAL LATTICES; CRYSTAL STRUCTURE; CRYSTALS; LANTHANUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; QUASI PARTICLES; RARE EARTH COMPOUNDS; SPECTRA; TRANSITION ELEMENT COMPOUNDS