New Local Vibrational Modes Related to Silicon in Bulk AlGaAs |
| P. Kaczor, Z.R. Żytkiewicz and L. Dobaczewski Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland |
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| A silicon-related local vibrational mode absorption in AlGaAs is reported for the first time. It consists of six peaks grouped around 450 cm-1 which form a distinct pattern. We believe that the new local vibrational mode absorption is a fingerprint of a single defect. Among the discussed microscopic structures the most plausible is a SiGa-SiAs pair complex with SiAs acceptor interacting with different Ga, Al nearest neighbour local environments. |
| DOI: 10.12693/APhysPolA.88.759 PACS numbers: 61.72.Vv, 63.20.Pw, 71.55.Eq |