Raman scattering of light from a charge-density-wave (CDW) phonon in an anisotropic CDW superconductor
Creators
- 1. 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
Description
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-NbSe2
Additional details
Publishing Information
- Journal Title
- Phys. Rev., B: Condens. Matter
- Journal Volume
- 32
- Journal Issue
- 3
- Series
- Phys. Rev., B: Condens. Matter.
- Journal Page Range
- 1464-1471
- ISSN
- 0163-1829
- CODEN
- PRMBD
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 17005141
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- ANISOTROPY; ELECTRON-PHONON COUPLING; METALS; PHONONS; PLASMA WAVES; RAMAN EFFECT; RAMAN SPECTRA; RENORMALIZATION; SPECTRAL FUNCTIONS; SUPERCONDUCTORS
- Descriptors DEC
- COUPLING; ELEMENTS; FUNCTIONS; QUASI PARTICLES; SPECTRA