M. FETAH Sabah

Prof

Directory of teachers

Department

Departement of Physics

Research Interests

Materials, DFT, Monte Carlo

Contact Info

University of M'Sila, Algeria

Email : sabah.fetah@univ-msila.dz

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Recent Publications

2024-09-16

Ab initio study of structural, electronic, dynamic and thermodynamic properties of the ternary alloy

a
Citation

M. FETAH Sabah, (2024-09-16), "Ab initio study of structural, electronic, dynamic and thermodynamic properties of the ternary alloy", [national] nanotechnolog perception , scopus

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2023-12-12

coherent ballistic phonenic transport at slab nanostructure in surface cristalline

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Citation

M. FETAH Sabah, (2023-12-12), "coherent ballistic phonenic transport at slab nanostructure in surface cristalline", [international] The Second International Conference on Energy Transition and Security , Adrar.Algeria

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2023-10-27

Structural, Electronic, Optical and Magnetic Properties of CuMnInSe3 compound.

abstract N: 331
The structural, electronic, magnetic and optical properties of the newly synthesized
quaternary chalcogenide, CuMnInSe3 were studied, after confirming the stability of its
tetragonal cells structure with similar magnitudes to the parents chalcopyrite structures
CuInSe2 , according to the available experimental results.
The study was carried out using the first principle calculations based on the density functional
theory (DFT), using the full potential linearized augmented plane wave (FP-LAPW)
approaches included in the (WIEN2k) code. The structural and elastic properties were
explored in detail by using the generalized gradient approximation for solids (GGA-PBEsol)
to treat the exchange-correlation effects. As the studied compounds contain transition metals
distinguished by a partially filled "3d" electron state, the functional approximation (TB- mBJ)
was used in addition to the (GGA-PBEsol) to study the other physical properties. The
compound is opaque and exhibits a significant absorption in the ultraviolet range.
Citation

M. FETAH Sabah, (2023-10-27), "Structural, Electronic, Optical and Magnetic Properties of CuMnInSe3 compound.", [international] 10th International Conference on Computational and Experimental Science and Engineering (ICCESEN 2023) Antalya.Turquie.27-30 Octobre 2023 , ANTALYA; TURKY

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Theoretical investigation of the optical properties of the Hg2CuTi-type full-Heusler compounds Ti2NiZ(Z=Al,Ga)

We used the density functional theory to study the optical properties of Hg2CuTi- type full
heusler compound Ti2NiZ(Z=Al,Ga), after confirming the stability of their cubic cell
structure at optimized lattice constant a0=6.13 𝐴𝐴0 and a0=6.1 𝐴𝐴0 for Ti2NiAl and
Ti2NiGa respectively . The study was carried out using the full potential linearized
augmented plane wave approaches. And by using the generalized gradient approximation
for solids to treat the exchange-correlation effects in addition to the (TB-mBJ).
These two ferromagnetic compounds , Ti2NiAl and Ti2NiGa, exhibit half-metallic behavior
with an indirect band gap (Γ − Χ ) of Eg=0.52 eV and Eg=0.61 eV respectivly and a total
magnetic moment of 3𝜇𝜇B . The optical properties were predicted and the spectra of the real
and imaginary parts of the permittivity, reflectivity function, the absorption coefficient, were
analyzed. These calculations indicat that these materials are useful as optical switch or filter
for infrared to visible energies since the components of the dispersive part of the dielectric
function lie in the visible region (1.7–3.3 eV) and show transitions from dielectric to metallic.
Citation

M. FETAH Sabah, (2023-10-27), "Theoretical investigation of the optical properties of the Hg2CuTi-type full-Heusler compounds Ti2NiZ(Z=Al,Ga)", [international] 10th International Conference on Computational and Experimental Science and Engineering (ICCESEN 2019) Antalya.Turquie.27-30 Octobre 2023 , ANTALYA; TURKY

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2023

Vibrational wave scattering in disordered ultrathin film with integrated nanostructures

A theoretical model, the phase-field matching theory, has been used to investigate the localized states, their associated states, the local vibrational density of states, the coherent conductance, and the associated thermal conductivity of the perturbed ultra-thin film quasi-dimensional crystalline lattice. The defect disrupts the system’s translational symmetry in the perpendicular direction to it, which is axis Ox, and induces a localized state in its behavior that is not present in the bulk, scattering the incident elastic wave. The model was analyzed for three different cases of elastic parameters: softening, homogeneous, and hardening. The purpose is to investigate how the local dynamics can respond to changes in the microscopic environment in the perturbed domain. The analysis of the total phononic conductance spectra and the local vibrational densities states identifies distinguishing characteristics and demonstrates the sensor’s potential use in nondestroyed control.
Citation

M. FETAH Sabah, Sansabilla Bouchareb, , (2023), "Vibrational wave scattering in disordered ultrathin film with integrated nanostructures", [national] Applied Rheology , De Gruyter

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2022

Amélioration des propriétés physico-chimiques des métaux recyclés ferreux et non-ferreux

PAS DE RESUME
Citation

M. FETAH Sabah, (2022), "Amélioration des propriétés physico-chimiques des métaux recyclés ferreux et non-ferreux", [national] UNIVERSITY OF MSILA

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COHERENCE BALLISTIC TRANSPORT IN ULTRATHIN FILM WITH BREAKING SYMETRY

A theoretical model, Phase Field Matching Theory (PFMT), has been used to investigate the localized states, their associated states, local vibrational density of states (LVDOS), the coherent conductance, and associated thermal conductivity of the perturbed ultra thin film quasi-dimensional crystalline lattice. The defect disrupts the system's translational symmetry in the perpendicular direction to it, which is axis Ox, and induces a localized state in its behavior that is not present in the bulk, scattering the incident elastic wave. We analysed our model for three different cases of the elastic parameters: softening, homogeneous and hardening. The purpose is to investigate how the local dynamics can respond to changes in the microscopic environment in the perturbed domain. The analysis of the total phononic conductance spectra and the local vibrational densities states identifies distinguishing characteristics and demonstrates the sensor's potential use in non-destroyed control.
Citation

M. FETAH Sabah, SANSABILLA BOUCHAREB, , (2022), "COHERENCE BALLISTIC TRANSPORT IN ULTRATHIN FILM WITH BREAKING SYMETRY", [international] International Conference on Trends and Innovations in Smart Technologies (ICTIST) , LONDON

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Structural, electronic and optical properties of the wide band gap semiconductors KGaQ2 (Q = S, Se) and of AGaTe2 (A = K, Cs)

In this paper, we studied the structural, electronic and some optical properties of KGaQ2 (Q = S, Se) and AGaTe2 (A = K, Cs) crystals using the pseudopotential plane-wave (PP-PW) method based on density functional theory (DFT), the generalized gradient approximation (GGA) parameterized by Perdew-Burke-Ernzerhof (GGA-PBE) is used for the exchange – correlation (XC) potential. We also use the hybrid density functional (HSE06) to study the electronic structures of these materials. Our results for the equilibrium lattice constants (a, b and c), angle β are in good agreement with experiment data. The electronic structure calculation suggested that crystals are direct-gap semiconductors, employing both the Perdew–Burke–Ernzerhof (PBE) and the hybrid (HSE06) functionals. We note that the hybrid density functional improved the value of band gap, and that the studied compounds are semiconductors with wide band gaps. We have also predicted the optical properties; the refractive index, the reflection coefficient and dielectric constant on high frequencies.
Citation

M. FETAH Sabah, NADJET BENMEKIDECHE, , (2022), "Structural, electronic and optical properties of the wide band gap semiconductors KGaQ2 (Q = S, Se) and of AGaTe2 (A = K, Cs)", [national] Revista Mexicana de Física , Sociedad Mexicana de Física, A. C. Departamento de Física, 2º Piso, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Alcaldía Coyacán, C.P. 04510, Ciudad de México

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2021

Electronic structure, magnetic and optical properties of Ti2NiAl Heusler alloy using First-principles calculations.

Density functional theory has been used to study the structural, electronic, magnetic and optical properties of Ti2NiAl Heusler alloy using generalized gradient approximation implemented through the WIEN2k code.The Ti2NiAl's cubic structure is mechanically stable in the F-43m space group and exhibits half-metallic behavior with a 0.52 eV indirect energy band gap (EG) along the Г-Χ. The total magnetic moment is 3µB at an optimized lattice constant (a0=6.13Å). Reflectivity, optical conductivity, dielectric function, absorption coefficient and energy loss have also been investigated as a function of incident energy for this alloy. The optical properties suggest that the material is also suitable for use as filters and in photoelectric applications such as thermal diodes, photo diodes, and optical switches for infrared to visible energy.
Citation

M. FETAH Sabah, sansabilla Bouchareb, , (2021), "Electronic structure, magnetic and optical properties of Ti2NiAl Heusler alloy using First-principles calculations.", [international] 2 ème Séminaire international sur les sciences de la matière (physique et chimie) , ORAN, ALGERIA

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Theoretical investigation of the optical properties of the Hg2CuTi-type full-heusler compound Ti2NiGa

We used the density functional theory to study the optical properties of Hg2CuTi-type fullheusler compound Ti2NiGa, after confirming the stability of its cubic cell structure at optimized lattice
constant (a0) 6.1 . The study was carried out using the full potential linearized augmented plane
wave approaches. And by using the generalized gradient approximation for solids to treat the
exchange-correlation effects in addition to the (TB-mBJ).
The ferromagnetic compound shows a Half-metallic behavior with an indirect band gap
( ) of 0.61 eV and a total magnetic moment of 3 B . The optical properties were predicted and
the spectra of the real and imaginary parts of the permittivity, reflectivity function, the absorption
coefficient, were analyzed. These calculations show that we can use the material as optical switch or
filter since the real part of the dielectric function lies in the visible region (1.7–3.3 eV) and show
transitions from dielectric to metallic at ranges of visible energies.
Citation

M. FETAH Sabah, (2021), "Theoretical investigation of the optical properties of the Hg2CuTi-type full-heusler compound Ti2NiGa", [international] 2 ème Séminaire international sur les sciences de la matière (physique et chimie) , ORAN, ALGERIA

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Modeling of global solar radiation in Algeria based on geographical and all climatic parameters.

The design of photovoltaic or solar systems and estimating their performance require knowledge of the intensity of solar radiation. The measurement of this parameter for some sites in Algeria is unfortunately not obvious. However, researchers are moving towards the modelling, estimation and prediction. To model the global solar radiation, we must take into account the geographical and climatic parameters such as sunshine duration, relative humidity, temperature, latitude site, etc. In this study, the modelling of daily global solar radiation on a horizontal plane according to the parameters mentioned above is based on the
statistical linear regression technique. The daily data used in the development and validation of models are extracted from the database of O. N. M (National Office of Meteorology, Dar el Beida. Algeria) for 2001-2005. We test the proposed models on two sites such as Djelfa and Ain-Bessam. For each site, validity and performance of the model will be studied based on the number of parameters introduced in the analytical expressions and results are discussed in terms of statistical errors as: R, MBE and RMSE between the measured global solar radiation and global solar radiation estimated. It was found that air temperature and relative humidity are indeed important climatic parameters for the prediction of solar radiation.
Citation

M. FETAH Sabah, (2021), "Modeling of global solar radiation in Algeria based on geographical and all climatic parameters.", [national] International Journal of Computational and Experimental Science and Engineering , İskender AKKURT

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2020

Structural and Electronic Properties of TiS2 and TiSe2 Determined from Generalized Gradient Approximation Study parameters

The electronic and optical properties of TiS2 and TiSe2 are studied by using an ab-initio calculation within the frame of density functional theory. A linearized and augmented plane wave basis set with GGA-PBEsol ,the generalized gradient approximation as proposed for solids. is used for the energy exchange-correlation determination. The results show a metallic character of these materials, and the plots of total and partial densities of states of TiS2 show the metallic character of the bonds and a strong hybridization between the states 𝑑 of Ti and 𝑝 of S below the Fermi energy
Citation

M. FETAH Sabah, (2020), "Structural and Electronic Properties of TiS2 and TiSe2 Determined from Generalized Gradient Approximation Study parameters", [national] the-1-st-national-conference-on-energy-transition-in-algeria-cntea1-2020 , MSILA. ALGERIA

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Investigations of Structural, Electronic, and Magnetic Properties of CuMnAlSe 3-Chalcogenide: FP-LAPW Method

A theoretical study of the structural, electronic and magnetic properties of the quaternary chalcogenide CuMnAlSe3 crystal is done by means of spin-polarized density functional theory calculations. The framework
of FP-LAPW method is used within the generalized gradient approximation, based on Perdew 2008 functional GGA-PBEsol. The calculated equilibrium structural parameters are in good agreement with the available experimental data. Based on the analysis of the spin-polarized band structures and density of states, we predict the half-metallic character of the studied compound, with a half-metallic gap of 0.962 eV, and a total magnetic moment of 6µB per unit-cell. We find that the inclusion of the electronic exchange-correlation through the newly developed TB-mBJ improves the description of the electronic structure. The TB-mBJ yields an indirect band gap (X - Γ) of 1.825 eV.
Citation

M. FETAH Sabah, FETAH SABAH, , (2020), "Investigations of Structural, Electronic, and Magnetic Properties of CuMnAlSe 3-Chalcogenide: FP-LAPW Method", [national] Acta Physica Polonica, A. . , the Institute of Physics, Polish Academy of Science in Warsaw

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2019

Investigations of Structural, Electronic and Magnetic Properties of new quaternary compounds: FP-LAPW Method

A theoretical study of the structural, electronic and magnetic properties of the quaternary chalcogenide CuMnAlSe3 crystal were investigated by means of spin-polarized density functional theory calculations by using the functional density theory in the framework of FP-LAPW method within the generalized gradient approximation, based on Perdew 2008 functional GGA-PBEsol. The calculated equilibrium structural parameters are in good agreement with the available experimental data. Based on the analysis of the spin-polarized band structures and density of states, we predict the half-metallic character of the studied compound, with a half-metallic gap of 0,962 eV, and a total magnetic moment of 6μB per unit-cell. We find that the inclusion of the electronic exchange-correlation through the newly developed TB-mBJ improves the description of the electronic structure. The TB-mBJ yields an indirect band gap (X - Г) of 1,825 eV.
Citation

M. FETAH Sabah, (2019), "Investigations of Structural, Electronic and Magnetic Properties of new quaternary compounds: FP-LAPW Method", [international] 6th International Conference on Computational and Experimental Science and Engineering (ICCESEN 2019) Antalya.Turquie.23-27 Octobre 2019 , ANTALYA; TURKY

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Modeling of global solar radiation in Algeria based on geographical and all climatic parameters

The design of photovoltaic or solar systems and estimating their performance require knowledge of the intensity of solar radiation. The measurement of this parameter for some sites in Algeria is unfortunately not obvious. However, researchers are moving towards the modelling, estimation and prediction. To model the global solar radiation, we must take into account the geographical and
climatic parameters such as sunshine duration, relative humidity, temperature, latitude site, etc. In this study, the modelling of daily global solar radiation on a horizontal plane according to the parameters mentioned above is based on the statistical linear regression technique. The daily data used in the development and validation of models are extracted from the database of O. N. M (National
Office of Meteorology, Dar el Beida. Algeria) for 2001-2005. We test the proposed models on two sites such as Djelfa and Ain-Bessam. For each site, validity and performance of the model will be studied based on the number of parameters introduced in the analytical expressions and results are discussed in terms of statistical errors as: R, MBE and RMSE between the measured global solar radiation and global solar radiation estimated. It was found that air temperature and relative humidity are indeed important climatic parameters for the prediction of solar radiation.
Citation

M. FETAH Sabah, (2019), "Modeling of global solar radiation in Algeria based on geographical and all climatic parameters", [international] 6th International Conference on Computational and Experimental Science and Engineering (ICCESEN 2019) Antalya.Turquie.23-27 Octobre 2019 , ANTALYA; TURKY

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