Resonance Raman Scattering in TlGaSe2 Crystals

SYRBU, N. N.; TIRON, A. V.; ZALAMAI, V. V.; BEJAN, N. P.

Resonance Raman Scattering in TlGaSe2 Crystals

SYRBU, N. N.; TIRON, A. V.; ZALAMAI, V. V.; BEJAN, N. P.

URI: https://doi.org/10.1155/2017/5787821
http://repository.utm.md/handle/5014/12203

Date: 2017

Abstract:

The resonance Raman scattering for geometries 𝑌(𝑌𝑋)𝑍 and 𝑌(𝑍𝑋)𝑍 at temperature 10 K and infrared reflection spectra in 𝐸 ‖ 𝑎 and 𝐸 ‖ 𝑏 polarizations at 300 K were investigated. The number of 𝐴𝑎 (𝐵𝑎) and 𝐴𝑢 (𝐵𝑢) symmetry vibrational modes observed experimentally and calculated theoretically agree better in this case than when TlGa2Se4 crystals belong to symmetry group. The emission of resonance Raman scattering and excitonic levels luminescence spectra overlap. The lines in resonance Raman spectra were identified as a combination of optical phonons in Brillouin zone center.