Semiconductor Physics, Quantum Electronics & Optoelectronics, 24 (3), P. 312-318 (2021).

The boson peak and the first sharp diffraction peak in (As2S3)x(GeS2)1-x glasses
A.V. Stronski1, T.S. Kavetskyy2,3, L.O. Revutska44, I. Kaban5, P. Jóvári6, K.V. Shportko1*, V.P. Sergienko7, M.V. Popovych1

1V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine,
41, prosp. Nauky, 03680 Kyiv, Ukraine
2Drohobych Ivan Franko State Pedagogical University,
24, I. Franko str., 82100 Drohobych, Ukraine
3The John Paul II Catholic University of Lublin,
14 Al. Racławickie, 20-950 Lublin, Poland
4National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”,
37, prosp. Peremogy, 03056 Kyiv, Ukraine
5IFW Dresden, Institute for Complex Materials,
Helmholtzstr. 20, 01069 Dresden, Germany
6Research Institute for Solid State Physics and Optics,
H-1525 Budapest, POB 49, Hungary
7National Pedagogical Dragomanov University,
9, Pirogova str., 01601 Kyiv, Ukraine
*Corresponding author e-mail:

Abstract. The parameters of the boson peak (BP) and the first sharp diffraction peak (FSDP) in (As2S3)x(GeS2)1x glasses measured using high-resolution Raman spectroscopy and high-energy synchrotron X-ray diffraction measurements are examined as a function of x. It has been found that there is no correlation between the positions of BP and FSDP. The BP position shows a nonlinear composition behavior with a maximum at about x = 0.4, whereas the FSDP position changes virtually linearly with x. The intensities of both BP and FSDP show nonlinear composition dependences with the slope changes at x = 0.4, although there is no direct proportionality. Analysis of the partial structure factors for the glasses with x = 0.2, 0.4 and 0.6 obtained in another study has shown that the cation-cation atomic pairs of Ge–Ge, Ge–As and As–As make the largest contribution to FSDP, where the Ge–Ge and Ge–As pairs are dominant.

Keywords:chalcogenide glasses, Raman spectroscopy, X-ray diffraction, boson peak, first sharp diffraction peak, molecular structural units.

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