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The band structure of birefractive CdGa2S4 crystals

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dc.contributor.author STAMOV, I. G.
dc.contributor.author SYRBU, N. N.
dc.contributor.author PARVAN, V. I.
dc.contributor.author ZALAMAI, V. V.
dc.contributor.author TIGINYANU, I. M.
dc.date.accessioned 2021-01-06T16:03:50Z
dc.date.available 2021-01-06T16:03:50Z
dc.date.issued 2013
dc.identifier.citation STAMOV, I. G., SYRBU, N. N., PARVAN, V. I. et al. The band structure of birefractive CdGa2S4 crystals. In: Optics Communications, 2013, V. 309, pp. 205-211. ISSN 0030-4018. en_US
dc.identifier.uri https://doi.org/10.1016/j.optcom.2013.07.032
dc.identifier.uri http://repository.utm.md/handle/5014/12393
dc.description Access full text – https://doi.org/10.1016/j.optcom.2013.07.032 en_US
dc.description.abstract In this paper, we report on the spectral dependence of Δn=no−ne for CdGa2S4 single crystals for shorter and longer wavelengths than the isotropic wavelength λ0=485.7nm (300K). It was established that Δn is positive at λ>λ0 and it is negative in the spectral range λ<λ0. The isotropic wavelength λ0 exhibits blue spectral shift with temperature decreasing. The ground and excited states of three excitonic series A, B and C with binding energies of 53meV, 52meV and 46meV, respectively, were found out at 10K. The effective masses of electrons for k=0 were derived from the calculation of excitonic spectra: mc∥(Е∥с)=0.21m0 and mc⊥(Е⊥с)=0.19m0. The holes masses are equal to 0.59m0 and 0.71m0 for Е∥с and Е⊥с, respectively. The value of valence bands splitting, V1−V2, by crystalline field equals 24meV, and V2−V3 splitting due to the spin–orbital interaction equals to 130meV. The optical functions n, k, ε1 and ε2 for Е⊥с and Е∥с polarizations were calculated by means of Kramers–Kronig analyses in the energy interval 3–6eV. The evidenced features are discussed taking into account the results of new theoretical calculations of CdGa2S4 band structure. en_US
dc.language.iso en en_US
dc.publisher Elservier en_US
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/us/ *
dc.subject semiconductors en_US
dc.subject optical absorptions en_US
dc.subject absorption en_US
dc.subject reflection spectra en_US
dc.subject spectra en_US
dc.subject Kramers–Kronig relations en_US
dc.subject excitons en_US
dc.subject bands en_US
dc.title The band structure of birefractive CdGa2S4 crystals en_US
dc.type Article en_US


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