Optical properties and birefringence of ZnIn2 S4 layered crystals
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STAMOV, Ivan, ZALAMAI, Victor, SYRBU, Nicolae, TIRON, Andrew. Optical properties and birefringence of ZnIn2 S4 layered crystals. In: Journal of Physics and Chemistry of Solids, 2020, nr. 136, p. 0. ISSN 0022-3697. DOI: https://doi.org/10.1016/j.jpcs.2019.05.013
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Journal of Physics and Chemistry of Solids
Numărul 136 / 2020 / ISSN 0022-3697 /ISSNe 0022-3697

Optical properties and birefringence of ZnIn2 S4 layered crystals

DOI: https://doi.org/10.1016/j.jpcs.2019.05.013

Pag. 0-0

Stamov Ivan1, Zalamai Victor2, Syrbu Nicolae2, Tiron Andrew2
 
1 T.G. Shevchenko State University of Pridnestrovie, Tiraspol,
2 Technical University of Moldova
 
Disponibil în IBN: 1 octombrie 2019


Rezumat

Interference spectra of layered ZnIn2S4 crystals were investigated for samples of different thicknesses (7.5–900 μm). Spectral dependences of refractive indices (na and nb) for light waves with different polarizations were calculated and their intersection observed at energy E0 ∼ 2.38 eV. The refractive indices difference (Δn = na − nb) was determined at energy range 0.8–3.0 eV. Features observed in reflection and absorption spectra were attributed to the band-to-band electron transitions at k = 0. Magnitudes of valence bands (V1V2 and V3V4) splitting due to crystal field and spin–orbital interaction were determined. Electron transitions in energy interval 2–6 eV were identified on the basis of available theoretical band structure calculations.

Cuvinte-cheie
Interference spectra, Birefringence, Frenkel excitons, refractive indices, Band structure