Localized Vibrational Modes of Interstitial Oxygen in SixGe1-x Alloys |
| M. Lorenc and J. Humlíček Laboratory of Thin Films and Nanostructures, Department of Solid State Physics, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic |
| Full Text PDF |
| We study infrared-active vibrations of interstitial oxygen in Czochralski-grown samples of SixGe1-x alloys with the silicon content from 0 to 1 between room and liquid nitrogen temperature. The measurements were performed on a large series of samples including single crystals of Si and Si-rich alloys, and polycrystalline samples of alloys with a higher Ge content. We focus on quantitative data on the compositional and temperature evolution of the strongest absorption band above 1100 cm-1, related to the asymmetric stretching of the Si2O pseudomolecule. We have also observed a pronounced Fano-like resonance centered at 520 cm-1. |
| DOI: 10.12693/APhysPolA.94.436 PACS numbers: 78.30.Am, 63.20.Pw |