Abstract
We report the resonance of the first-order Raman scattering by longitudinal and transverse optical phonons in GaAs very near to the E0 band gap at 100 K. The resonance enhancement observed at E0 for deformation-potential (TO,LO) and Fröhlich-interaction-induced (LO) scattering is about 100 times larger than calculated for uncorrelated electron-hole pairs. The effect is attributed to the Coulomb correlation of discrete and continuum excitons and agrees with Martins calculation of these effects. The Faust-Henry coefficient is found to be nearly independent of frequency in the region of our measurements (C=-0.60.2).
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2886-2891 |
| Number of pages | 6 |
| Journal | Physical Review B |
| Volume | 35 |
| Issue number | 6 |
| DOIs | |
| State | Published - 1987 |
| Externally published | Yes |
ASJC Scopus subject areas
- Condensed Matter Physics