Search Results - "Brezvin, R. S."

Ionicity and birefringence of α-LiNH4SO4 crystals: ab initio DFT study, X-ray spectroscopy measurements by Rudysh, M. Ya, Brik, M. G, Khyzhun, O. Y, Fedorchuk, A. O, Kityk, I. V, Shchepanskyi, P. A, Stadnyk, V. Yo, Lakshminarayana, G, Brezvin, R. S, Bak, Z, Piasecki, M

“…The structural, electronic properties and ionicity of the lithium ammonium sulfate dielectric crystals are examined using a complex approach including…”
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On Isotropic Points in K2SO4 Impurity Crystals by Stadnyk, V. Yo, Matviiv, R. B., Brezvin, R. S., Shchepanskyi, P. A., Kogut, Z. A.

“…The temperature, spectral and baric dependences of birefringence Δ n i of potassium sulfate crystals doped with 1.7% of copper are studied. It is established…”
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Energy Band Structure and Optical Properties of LiNaSO4 Crystals by Shchepanskyi, P. A., Stadnyk, V. Yo, Rudysh, M. Ya, Brezvin, R. S., Andrievskii, B. V.

“…The energy band structure of a LiNaSO 4 has been calculated within the framework of density functional theory for space group P 31 c . It has been established…”
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Refractive Parameters and Band Energy Structure of K2SO4 Crystals Doped with Copper by Stadnyk, V. Yo, Matviiv, R. B., Rudysh, M. Ya, Brezvin, R. S., Shchepanskyi, P. A., Andrievskii, B. V.

“…Potassium sulfate crystals with a copper content of 1.7% were synthesized, and the dependence of their refractive indices n i ( λ ) and birefringence Δn i ( λ…”
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Pressure-Induced Changes in Parameters of the Indicatrix of Lithium Sodium Sulfate Crystals by Stadnyk, V. Yo, Shchepanskyi, P. A., Brezvin, R. S., Rudysh, M. Ya, Matviiv, R. B.

“…Spectral, temperature, and baric dependences of birefringence Δ n i of LiNaSO 4 (LSS) crystals have been studied. It is established that dispersion Δ n (λ) is…”
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On Isotropic Points in Potassium Ammonium Sulphate Crystals by Stadnyk, V. Yo, Shchepanskyi, P. A., Brezvin, R. S., Rudysh, M. Ya, Kohut, Z. A., Onufriv, O. R., Kost, Ya. P.

“…An effect of uniaxial pressure on the spectral and temperature dependences of birefringence of K 1.75 [NH 4 ] 0.25 SO 4 single crystals has been studied…”
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Specific features of refractive, piezo-optic and nonlinear optical dispersions of β-LiNH4SO4 single crystals by Rudysh, M.Ya, Stadnyk, V.Yo, Shchepanskyi, P.A., Brezvin, R.S., Jedryka, J., Kityk, I.V.

“…The crystals of LiNH4SO4 in β-modification are synthesized and the parameters of their crystalline unit cell are refined from XRPD spectra using Rietveld…”
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Raman Scattering Spectra of β-LiNH4SO4 Crystals by Rudysh, M. Ya, Kashuba, A. I., Stadnyk, V. Yo, Brezvin, R. S., Shchepanskyi, P. A., Gaba, V. M., Kohut, Z. O.

“…Vibrational spectra of β-LiNH 4 SO 4 crystals in the ferroelectric phase (space group No. 33) are studied. The vibrational symmetry is classified using…”
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Temperature behavior of thermal expansion and birefringence of In x Tl1–х І-substitution solid solutions by Franiv, A. V., Stadnyk, V. Y., Kashuba, A. I., Brezvin, R. S., Bovgira, O. V., Futei, A. V.

“…Results of studying the optical properties of InxTl1–хI solid solutions in the concentration domain of 0.4 ≤ х ≤ 0.9 are presented. The dependence of relative…”
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Birefringence of β-LiNH4SO4 crystals with Mn2+ impurity under uniaxial pressures by Brezvin, R.S., Rudysh, M.Ya, Stadnyk, V.Yo, Shapravskyi, A.O., Yakymets, D.I., Shchepanskyi, P.A.

“…Single crystals of LiNH4SO4:Mn2+ (5 wt %) were synthesized through the slow evaporation method. The effect of applying uniaxial mechanical pressure along the…”
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Influence of Mn2+ doping on refractive and electronic properties of β-LiNH4SO4 crystals by Brezvin, R.S., Piasecki, M., Kostetskyi, O.Ya, Shchepanskyi, P.A., Stadnyk, V.Yo, Onufriv, O.R., Rudysh, M.Ya

“…β-LiNH4SO4:Mn2+ crystals with 2 and 5 wt% Mn2+ concentration have been synthesized. The crystalline structure of impurity crystals was identified and refined…”
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Optical and electronic parameters of Rb2SO4 crystals by Rudysh, M. Ya, Pryshko, I.A., Shchepanskyi, P.A., Stadnyk, V. Yo, Brezvin, R.S., Kogut, Z.O.

“…Good-quality rubidium sulfate Rb2SO4 crystals were grown by slow evaporation of the solvent. The study of single-phase crystalline structure was performed by…”
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Structure, electronic, optical and elastic properties of (NH4)2BeF4 crystal in paraelectric phase by Rudysh, M.Ya, Fedorchuk, A.O., Stadnyk, V.Yo, Shchepanskyi, P.A., Brezvin, R.S., Horon, B.I., Khyzhun, O.Yu, Gorina, O.M.

“…The theoretical study of the structure and specific properties of the (NH4)2BeF4 crystal is carried out within the framework of the DFT. The band-energy…”
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Refractometry of mechanically compressed RbKSO4 crystals by Stadnik, V. I., Romanyuk, N. A., Brezvin, R. S.

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Structure, refractive and electronic properties of K2SO4:Cu2+ (3%) crystals by Matviiv, R.B., Rudysh, M. Ya, Stadnyk, V. Yo, Fedorchuk, A.O., Shchepanskyi, P.A., Brezvin, R.S., Khyzhun, O.Y.

“…K2SO4:Cu2+ (3%) crystal has been synthesized and its crystal structure is characterized by means of the X-ray diffraction method and discussed within the…”
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Ab initio calculations of the electronic structure and specific optical features of β-LiNH4SO4 single crystals by Rudysh, M.Ya, Brik, M.G., Stadnyk, V.Yo, Brezvin, R.S., Shchepanskyi, P.A., Fedorchuk, A., Khyzhun, O.Y., Kityk, I.V., Piasecki, M.

“…In the present work complex experimental and theoretical studies of electronic and optical properties for β-lithium-ammonium sulfate crystals of good optical…”
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Energy Band Structure and Optical Properties of LiNaSO{sub 4} Crystals by Shchepanskyi, P. A., Stadnyk, V. Yo, Rudysh, M. Ya, Brezvin, R. S., Andrievskii, B. V.

“…The energy band structure of a LiNaSO{sub 4} has been calculated within the framework of density functional theory for space group P31c. It has been…”
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Temperature behavior of thermal expansion and birefringence of InxTl1–хІ-substitution solid solutions by Franiv, A. V., Stadnyk, V. Y., Kashuba, A. I., Brezvin, R. S., Bovgira, O. V., Futei, A. V.

“…Results of studying the optical properties of In x Tl 1– х I solid solutions in the concentration domain of 0.4 ≤ х ≤ 0.9 are presented. The dependence of…”
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Energy band structure of LiNH4SO4 crystals by Rudysh, M. Ya, Stadnyk, V. Yo, Brezvin, R. S., Shchepanskii, P. A.

“…The genesis of the LiNH 4 SO 4 crystal has been determined, the energy band structure and the total and partial electron densities of states have been…”
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Piezo-optic properties of LiNH4SO4 crystals by Stadnyk, V. Yo, Brezvin, R. S., Rudish, M. Ya, Shchepanskii, P. A., Kurlyak, V. Yu

“…The effect of uniaxial stresses applied along the principle crystallographic directions on the dispersion and temperature dependences of birefringence of LiNH…”
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