Аннотация:
The effect of doping with tin on the $\nu_3$ vibrational mode of oxygen in Ge has been studied. The appearance of three new series of absorption lines besides the $\nu_3$ oxygen vibration spectra was found. The spectrum structure in each series of lines found is similar to the $\nu_3$ oxygen spectrum structure in Ge. But unlike the $\nu_3$ mode, the fine structure due to rotational–vibrational interaction of the $\nu_3$ and $\nu_2$ modes is not observed and the spectrum structure remains up to temperatures of 130 K. The found three sets of absorption lines are ascribed to the $\nu_3$ vibration of interstitial oxygen disturbed by tin atoms located in the nearest environment. The assumption has been made that no rotation of oxygen around a Ge–Ge bond for a Ge–O–Ge quasi-molecule disturbed by a neighbour Sn atom occurs.
Поступила в редакцию: 04.03.2010 Принята в печать: 15.03.2010