Raman scattering of light from a charge-density-wave (CDW) phonon in an anisotropic CDW superconductor

Journal Article · Thu Aug 01 04:00:00 EDT 1985 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.32.1464· OSTI ID:5558483

Lei, X L; Ting, C S; Birman, J L

The probability of Raman scattering of light by a charge-density-wave (CDW) phonon is calculated for a model anisotropic system which exhibits coexistent CDW and superconducting characteristics. It is pointed out that in such a system both ordinary electron-phonon interactions and the modified Balseiro-Falicov interaction contribute to the Raman activity of the CDW phonon. The Raman spectrum obtained has features qualitatively similar to that of the renormalized spectral function of the CDW phonon previously discussed. However, the inclusion of the electron-photon vertices may considerably enhance the weight of the superconducting gap peak relative to the CDW amplitude mode. The polarizations of the incident and scattered light enter the expressions of the scattering probability, thus giving a natural explanation for the intensity difference of the gap peaks in the A and E modes observed in experiments by Sooryakumar and Klein on 2H-NbSe/sub 2/.

• Research Organization: Department of Physics, City College, City University of New York, New York, New York 10031 and Shanghai Institute of Metallurgy, Chinese Academy of Sciences, Shanghai, China
• OSTI ID: 5558483
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 32:3; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-PHONON COUPLING
ELEMENTS
FUNCTIONS
METALS
PHONONS
PHYSICAL PROPERTIES
PLASMA WAVES
QUASI PARTICLES
RAMAN EFFECT
RAMAN SPECTRA
RENORMALIZATION
SPECTRA
SPECTRAL FUNCTIONS
SUPERCONDUCTIVITY
SUPERCONDUCTORS