Answers are grounded in this paper and cite their sources.
The vibrational properties of GaAs/AlAs (001) superlattices are studied theoretically by means of an ab initio approach---based on interatomic force constants---that allows one to treat the effects of compositional disorder using very large supercells. We find that the experimental Raman spectra in thin samples cannot be explained without taking into account disorder occurring at the interfaces. Moreover, we show that some of the AlAs-like LO modes are extremely sensitive to disorder, and they are therefore suitable for a rather precise characterization of the samples.
No takes yet. Share an insight, caveat, or question.
Molinari et al. (1992) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: