FOUZI Amari
عماري فوزي
fouzi.amari@univ-msila.dz
0662334540
- Departement of Physics
- Faculty of Sciences
- Grade PHd
About Me
Sciences de la Matière
Location
Berhoum, MAGRA
Msila, ALGERIA
Code RFIDE- 1994-05-22 00:00:00
-
FOUZI Amari birthday
- 2025-10-09
-
2025-10-09
Material properties of zinc-blende CdSe under pressure: phase stability, mechanical behaviour, dielectric response, and polaron effects from first principles
We investigate the phase stability, elastic properties, dynamical behavior, dielectric response, and polaron characteristics of zinc-blende CdSe under hydrostatic pressure using first-principles calculations within the generalized gradient approximation (GGA). The computed zinc-blende to rock-salt phase transition occurs at 2.65 GPa, consistent with experiment. Elastic constants C11 and C12 increase with pressure, while C44 decreases. The static dielectric constant decreases under pressure, whereas the high-frequency constant rises. Phonon dispersion shows all modes remain positive up to 3 GPa, confirming dynamical stability. The piezoelectric constant increases linearly from 0.82 to 0.92 C/m² in the 0-3 GPa range. Both electron and polaron effective masses increase with pressure, while the Fröhlich coupling parameter decreases, indicating weaker electron-phonon interaction. These findings provide detailed insight into the mechanical, dielectric, and transport properties of CdSe under compression, emphasizing its potential for pressure-tunable optoelectronic applications.
Citation
NADIR Bouarissa , FOUZI Amari , SALIMA Saib , , (2025-10-09), Material properties of zinc-blende CdSe under pressure: phase stability, mechanical behaviour, dielectric response, and polaron effects from first principles, Phase Transitions, Vol:98, Issue:12, pages:623-638, Taylor & Francis Online
- 2025-09-16
-
2025-09-16
Ab Initio Investigation of Physical Properties of Ferromagnetic Manganese Selenide in the Zinc-Blende and Rock-Salt Structures under Hydrostatic Pressure
This work presents a thorough analysis of the electronic, optical, and thermodynamic characteristics of ferromagnetic manganese selenide (MnSe) in both zinc-blende and rock-salt phases. Utilizing plane wave pseudo-potential calculations within the framework of spin-polarized density functional theory, our analysis offers a comprehensive evaluation. The calculated lattice parameters demonstrate a high level of concordance with available experimental data. Our findings indicate that MnSe compounds are semiconductors, as determined by their electronic band structures and density of states. Significant observations include the reduction in magnetic moments under increasing pressure, up to 10 GPa. Furthermore, we provide a detailed analysis of energy-dependent linear optical functions, including the complex dielectric function, complex refractive index, and reflectivity, and discuss their implications. Along with providing forecasts and in-depth discussions, our work clarifies the dependency of several thermodynamic variables on temperature and pressure for the compounds under investigation, including the bulk modulus, heat capacity, and thermal expansion coefficient.
Citation
NADIR Bouarissa , FOUZI Amari , SALIMA Saib , Adel Allal, , (2025-09-16), Ab Initio Investigation of Physical Properties of Ferromagnetic Manganese Selenide in the Zinc-Blende and Rock-Salt Structures under Hydrostatic Pressure, Physics of the Solid State, Vol:67, Issue:, pages:783–794, Springer Nature