Micro-raman spectra of Ge–As–Se chalcogenide amorphous powders
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Condensed matter physics. Solid state physics (349)
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IASENIUC, Oxana, YOVU, M., GHIULNARE, A., MESTERCA, Raluca, JDERU, A., ENACHESCU, Marius. Micro-raman spectra of Ge–As–Se chalcogenide amorphous powders. In: Moldavian Journal of the Physical Sciences, 2018, nr. 3-4(17), pp. 161-166. ISSN 1810-648X. DOI: https://doi.org/10.5281/zenodo.4019258
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Moldavian Journal of the Physical Sciences
Numărul 3-4(17) / 2018 / ISSN 1810-648X /ISSNe 2537-6365

Micro-raman spectra of Ge–As–Se chalcogenide amorphous powders

DOI: https://doi.org/10.5281/zenodo.4019258
CZU: 538.9+539.2

Pag. 161-166

Iaseniuc Oxana1, Yovu M.1, Ghiulnare A.2, Mesterca Raluca2, Jderu A.2, Enachescu Marius23
 
1 Institute of Applied Physics,
2 University Politehnica of Bucharest,
3 Academy of Romanian Scientists
 
Disponibil în IBN: 30 ianuarie 2019


Rezumat

Analysis of the Micro-Raman spectra of GexAsxSe1–2x (x = 0.05–0.30) amorphous chalcogenide glasses are reported. The Micro-Raman spectra exhibit three main peaks located at about V= 193, 213, and 255 cm–1. The peaks at around V = 193 and 213 cm–1 can be attributed to the vibrations of GeSe bonds. The presence of the Raman peak at about V = 255 cm–1 is attributed to the bond-stretching vibrations of the disordered Se chains and rings. With an increase in the Ge concentration, this peak is shifted to a higher wavenumber due to the shortening of the Se chains. The peak at about V = 300 cm–1 is characteristic of the Ge–Ge vibration mode. It is found that the different Ge concentrations slightly change the shape of the Micro-Raman spectra, mainly the intensity ratio.