Sood, A. K. ; Menéndez, J. ; Cardona, M. ; Ploog, K. (1985) Resonance Raman scattering by confined LO and TO phonons in GaAs-AlAs superlattices Physical Review Letters, 54 (19). pp. 2111-2114. ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v54/i19/p2111_1
Related URL: http://dx.doi.org/10.1103/PhysRevLett.54.2111
Abstract
It is shown that in GaAs-AlAs superlattices the confined longitudinal-optic Raman phonons created via either deformation-potential or Fröhlich electron-phonon interaction are different. This effect is demonstrated by comparison of resonance and off-resonance Raman spectra. Phonons of A1 symmetry (point group D2d) dominate in resonance, while B2 phonons are stronger in the off-resonance case. The resonance profile of the A1 modes is discussed. We also report the observation of confined transverse-optic phonons under extremely resonant conditions.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 50264 |
| Deposited On: | 22 Jul 2011 13:37 |
| Last Modified: | 22 Jul 2011 13:37 |
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