Publication details
Infrared vibrations of interstitial oxygen in silicon-rich SiGe alloys
| Authors | |
|---|---|
| Year of publication | 2006 |
| Type | Article in Periodical |
| Magazine / Source | Physica B |
| MU Faculty or unit | |
| Citation | |
| Field | Solid matter physics and magnetism |
| Keywords | Germaniumsilicon alloys; Oxygen; Infrared absorption |
| Description | We report on the infrared spectra of the antisymmetric stretching vibration of Oi in Si-rich Si1xGex alloys. The shift of its frequency is obtained as a function of the germanium content x below 0:5. We present a decomposition of the low-temperature spectra using GaussLorentz profiles. A low-lying broad band is found for x ź 0:08, and assigned tentatively to the vibrations of Si2O units with the nearest sites occupied by several Ge atoms. We compare our experimental findings with results of a recent ab initio study of the phonon modes. |
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