Browsing by Author "Labdelli, Abbes"

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Optoelectronic And Magnetic Properties Of The Ortho-perovskite Gdruo3 Using Dft+u With Spin-orbit Coupling
    (Oum-El-Bouaghi University, 2018) Labdelli, Abbes; Meskine, Said; Boukortt, Abdelkader; Khenata, Rabah
    We have investigated the structural, magnetic, and optoelectronic properties of the ortho-perovskite GdRuO3 using the accurate full-potential linearized augmented plane wave (FP-LAPW) method based on the density functional theory (DFT). The generalized gradient approach (GGA) was used to treat the exchange and correlation potential while the GGA+U was found to correct the deficiencies of the GGA. The Hubbard U was taken to be 6 eV (an experimental value). Besides, the modified Becke–Johnson (mBJ) exchange potential was also adopted along in combination with the GGA+U approach (mBJ+U) to enhance the description of the electronic structure. The A-type antiferromagnetic phase of the compound GdRuO3 is more stable than the other magnetic phases. The calculated magnetic moments in GdRuO3 were found to emerge especially from the Gd-4f states electrons. The different values semiconductor gap obtained respectively with GGA+U and mBJ+U were 1.4269 eV and 2.9039 eV. These values were increased at 3.5355 eV with the investigation of spin–orbit coupling effects (SOC) on the electronic structure. The mBJ+U+SOC approximation was also used to calculate the optical properties by determining the complex dielectric function from which are derived the other parameters.
  • No Thumbnail Available
    Item
    Predictive ab-initio study of optoelectronic and magnetic properties of BaDyO3 new perovskite
    (Oum-El-Bouaghi University, 2023) Labdelli, Abbes
    The full potential linear augmented plane wave (FP-LAPW) method based on density functional theory (DFT), is used to study the structural, optoelectronic and magnetic properties of BaDyO3, in different phases: cubic (space group pm3m), Tetragonal (I4mcm), orthorhombic (Ibmm, pbnm and pnma) with both generalized gradient approximation (LSDA) as well as The DFT-D3 method who gives structural results very close to the experimental, and LSDA+U approaches, where U is on-site Coulomb interaction correction.. We have analyzed the structural parameters, total and partial densities of states. The results show a ferromagnetic ground state for BaDyO3 in LSDA+U due to the strong hybridization effect between Dy-4f and Ba-4f states. The integer value of the total magnetic moment is one of the significance of the semiconductor nature of this material. Furthermore, the results obtained, make the orthorhombic BaDyO3 a promising candidate for application in spintronic.