Vibrational modes of carbon-aluminum complexes in AlxGa1−xAs grown by metalorganic molecular beam epitaxy
- 7 October 1991
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 59 (15) , 1881-1883
- https://doi.org/10.1063/1.106176
Abstract
We investigated the effect of Al atoms on the localized vibrational mode (LVM) due to C in heavily C‐doped AlGaAs grown by metalorganic molecular beam epitaxy (MOMBE). Several satellite peaks were observed in the range between 550 and 650 cm−1, instead of the C LVM at 583 cm−1, which has fine structure caused by Ga isotopes. We conclude these satellite peaks are due to C atoms perturbed by the surrounding Al atoms. Also, the C fine structure was not observed in heavily C‐doped GaAs grown by MOMBE. We further conclude that the C fine structure cannot be observed in heavily C‐doped AlGaAs because of strong perturbation from the surrounding Al and C atoms.Keywords
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