Micro-Raman spectra of bulk GexAsxSe1-2X chalcogenide glasses
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IASENIUC, Oxana; IOVU, Mihail; GHIULNARE, A.; MESTERCA, Raluca; JDERU, A.; ENACHESCU, Marius. Micro-Raman spectra of bulk GexAsxSe1-2X chalcogenide glasses. In: Proceedings of the Romanian Academy Series A - Mathematics Physics Technical Sciences Information Science. 2018, nr. 4(19), pp. 545-550. ISSN 1454-9069.
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Proceedings of the Romanian Academy Series A - Mathematics Physics Technical Sciences Information Science
Numărul 4(19) / 2018 / ISSN 1454-9069

Micro-Raman spectra of bulk GexAsxSe1-2X chalcogenide glasses


Pag. 545-550

Iaseniuc Oxana1, Iovu Mihail1, Ghiulnare A.2, Mesterca Raluca2, Jderu A.2, Enachescu Marius23
 
1 Institute of Applied Physics,
2 University Politehnica of Bucharest,
3 Romanian Academy of Science
 
Disponibil în IBN: 21 iunie 2019


Rezumat

In this work are reported the Micro-Raman spectra of GexAsxSe1-2x (x = 0.05÷0.30). The Micro-Raman spectra consist of three main peaks located around ν = 193 cm-1, ν = 213 cm-1, and ν = 255 cm-1. The peaks around ν = 193 cm-1 and ν = 213 cm-1 could be attributed to the vibration of GeSe bonds. The presence of the Raman peak at ν = 255 cm-1 is due to the bond-stretching vibration of the disordered Se chains and rings. With the increase of the Ge concentration this peak shifts to a higher wavenumber due to the shortening of Se chains. The peak around ν = 300 cm-1 is characteristic to Ge-Ge vibration mode. The Ge concentration slightly changes the shape of Micro-Raman spectra, mainly its ratio of the intensity.

Cuvinte-cheie
chalcogenide glasses, Coordination number, Micro-, Raman spectra