FROHLICH-INTERACTION-INDUCED MULTIPHONON RAMAN-SCATTERING IN SRCUO2 AND SR0.5CA0.5CUO2

Authors
ABRASHEV MV LITVINCHUK AP THOMSEN C POPOV VN
Citation
Mv. Abrashev et al., FROHLICH-INTERACTION-INDUCED MULTIPHONON RAMAN-SCATTERING IN SRCUO2 AND SR0.5CA0.5CUO2, Physical review. B, Condensed matter, 55(14), 1997, pp. 8638-8641
Citations number
18
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
55
Issue
14
Year of publication
1997
Pages
8638 - 8641
Database
ISI
SICI code
0163-1829(1997)55:14<8638:FMRISA>2.0.ZU;2-V
Abstract
Polarized Raman spectra of Sr1-xCaxCuO2 (x=0, 0.5) microcrystals were studied experimentally. In addition to the Raman-allowed modes, we obs erved numerous lines with A(g) symmetry and frequencies up to 2400 cm( -1), which appear only for polarizations parallel to the chains. We sh ow that this additional Raman scattering originates from the three inf rared-active-only B-lu, LO modes and their overtones and combinations, becoming Raman active via Frohlich interaction.