ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The plasmon-longitudinal optical phonon vibrational modes in heavily doped GaAs/AlAs superlattices were analyzed both with Fourier transform infrared and Raman spectroscopies. The modes polarized in the direction normal to the layers were observed in the infrared spectra, while the Raman spectra revealed those modes polarized along the layers. The experimental results allowed us to derive the dispersion relations of the electrons in both directions and these relations were found to be in good agreement with the miniband dispersions calculated in the envelope function approximation when both Γ and X conduction electron states were taken into account. No evidence of the contribution of the two-dimensional electron states to the vertical transport was found. © 1996 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.362354