Abstract
The Raman spectra of AsxS1−x glasses with x < 40 at % (Z < 2.4) have been studied in a wide temperature range (20–300 K). A well resolved boson peak is observed in the low-frequency portion of the spectrum, not withstanding the appearance of floppy modes in the glasses under study. It is shown that the boson peak is characterized by two parameters: intensity and the peak position. A comparison of the intensity variation for the boson peaks indicates that the degree of disorder increases as x decreases. This effect is caused by floppy modes in the glass network and by sulfur phase separation. Studies of reduced boson peaks in the Raman spectra of AsxS1−x glasses confirms the theoretical assumption that the shape of the peaks is independent of composition and temperature.
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Translated from Fizika i Tekhnika Poluprovodnikov, Vol. 39, No. 8, 2005, pp. 995–997.
Original Russian Text Copyright © 2005 by Arsova, Boulmetis, Raptis, Pamukchieva, Skordeva.
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Arsova, D., Boulmetis, Y.C., Raptis, C. et al. The boson peak in Raman spectra of AsxS1−x glasses. Semiconductors 39, 960–962 (2005). https://doi.org/10.1134/1.2010693
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DOI: https://doi.org/10.1134/1.2010693