Resonance Raman scattering and excitonic spectra in TlInS2 crystals

Syrbu Nicolae; Dorogan Valerian

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971

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2018-08-28 14:56

SM ISO690:2012

, , , , SYRBU, Nicolae, , , DOROGAN, Valerian. Resonance Raman scattering and excitonic spectra in TlInS2 crystals. In: Journal of Luminescence, 2015, vol. 160, pp. 195-201. ISSN 0022-2313. DOI: https://doi.org/10.1016/j.jlumin.2014.12.011

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Journal of Luminescence

Volumul 160 / 2015 / ISSN 0022-2313

Resonance Raman scattering and excitonic spectra in TlInS₂ crystals

DOI:https://doi.org/10.1016/j.jlumin.2014.12.011

Pag. 195-201

¹, ², Syrbu Nicolae³, ¹, Dorogan Valerian³

¹ Institute of Applied Physics, Academy of Sciences of Moldova,
² T.G. Shevchenko State University of Pridnestrovie, Tiraspol,
³ Technical University of Moldova

Disponibil în IBN: 18 decembrie 2017

Rezumat

The excitons ground and excited states for E∥a and E∥b polarizations in absorption and reflection spectra of TlInS₂ crystals were detected. The fundamental parameters of excitons and bands were determined at k=0. The resonance Raman spectra were investigated in the region of excitons transitions. The resonance Raman scattering spectra with participation of optical phonons that are active at the center of Brillouin zone were identified. The Raman scattering in Y(YX)Z and Y(ZX)Z geometries at 10 K with excitation by He-Ne laser was researched. Energies of phonons with A_g and B_g symmetries were determined. It was shown that the number of modes at 10 K was two times lower than expected according to theoretical calculations.

Cuvinte-cheie
Excitons, Optical phonons, Reflection and transmission spectra, Resonance Raman scattering, Wavelength-modulated spectra, Thallium chalcogenides

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