Etude Des Propriétés Physiques Des Clusters De Germanium Dopés Pour Les Composants Optoélectroniques
Résumé: In this thesis, we study a systematic theory to calculate the structural, energetic, electronic and magnetic properties of SiGen, SeGen as well as GaGen clusters of cluster size n from 1 to 20 atoms, using density functional theory (DFT) within generalized gradient approximation GGA implemented in SIESTA simulation package. We have come to determine the most stable structures for all the studied clusters, and the relative stability was studied by calculating the binding energy for each atom Eb/atom and the fragmentation energy Ef, the second order energy difference Δ2E, in addition to calculating the electronic and magnetic properties by finding the HOMO-LUMO gap, the vertical electronic affinity VEA, the vertical ionization potential VIP and the chemical hardness η as well as the values of the total magnetic moment μ. We also studied the optical properties of SiGen clusters (n = 1-20) by calculating and discussing the optical absorption spectra based on the OCTOPUS simulation code according to the time-dependent density functional theory (TDDFT).
Mots-clès:
Nos services universitaires et académiques
Thèses-Algérie vous propose ses divers services d’édition: mise en page, révision, correction, traduction, analyse du plagiat, ainsi que la réalisation des supports graphiques et de présentation (Slideshows).
Obtenez dès à présent et en toute facilité votre devis gratuit et une estimation de la durée de réalisation et bénéficiez d'une qualité de travail irréprochable et d'un temps de livraison imbattable!