Phonon properties and Raman response of (113) GaAs/AlAs corrugated superlattices

15 January 1995

journal article
research article
Published by American Physical Society (APS) in Physical Review B

Vol. 51 (3) , 1647-1652
https://doi.org/10.1103/physrevb.51.1647

Abstract

We present an analysis of the vibrational properties and Raman response of (113)-oriented GaAs/AlAs superlattices with periodically corrugated interfaces. The vibrational properties have been calculated using the bond-charge model and the Raman response is evaluated in the framework of the bond polarizability model. We have measured the Raman spectra of samples grown by molecular-beam epitaxy, where an additional in-plane periodicity was expected, and of samples grown by atomic-layer molecular-beam epitaxy, which did not present this new in-plane periodicity. The comparison between the experimental results and the theoretical simulations suggests that faceting of the surface observed in the samples grown by molecular-beam epitaxy is not maintained in the buried interface.

Keywords

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