PUBLISHED PAPERS #01.04
| Aysel Talifli, Khayala Aligulieva. Experimental Investigation of Vibrational Properties of In2Se3 |
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| Abstract. The results of the study of vibrational properties of the semiconductor compound In2Se3 are presented: theoretically, by the density functional perturbation theory (DFPT) method, and experimentally, using Raman spectroscopy. Comparison of Raman scattering measurements and lattice dynamics calculations allowed us to identify four Raman-active modes detected at 91.28, 104.5, 182.68 and 193.6 cm-1. Identification of phonon modes was carried out by considering the point symmetry group. The results of phonon mode identification confirmed the R3m symmetry of the α-In2Se3 phase. A comparison of the results with the experimental data available in the literature, obtained by the Raman spectroscopy method, is also performed. The calculated frequencies and symmetries of the phonon modes in the center of the Brillouin zone are in good agreement with the experimental data. |
| Keywords: In2Se3, Raman scattering, IR and Raman active modes, phonon dispersion, phonon density of states |
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| DOI: https://doi.org/10.30546/MaCoSEP2025.1132 |