Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Ali Khalal"'
Publikováno v:
Superlattices and Microstructures. 127:151-156
We have used the envelope function formalism (EFF) to investigate the bands structure, energy subbands and carrier's effective mass in the growth direction and in-plan of InAs(d1 = 160 A)/GaSb(d2 = 105 A) semimetallic superlattice. The photodetector
Publikováno v:
E3S Web of Conferences, Vol 229, p 01036 (2021)
We have investigated in the bands structure and the effective mass, respectively, along the growth axis and in the plane of InAs (d1=48.5Å)/GaSb(d2=21.5Å) type II superlattice (SL), performed in the envelop function formalism. We studied the semico
Autor:
Ali Khalal, Es-Said El-Frikhe, H. Charifi, Ahmed Tirbiyine, Thami Ait Taleb, Abdelhakim Nafidi, Hassan Chaib
Publikováno v:
Optical and Quantum Electronics. 46:179-192
The electrical and linear electro-optical properties of BaTiO $$_{3}$$ (BT)/SrTiO $$_{3}$$ (ST) superlattices epitaxially grown on ST substrate are theoretically investigated using a microscopic quantum mechanical model based on the orbital approxima
Autor:
Abdelhakim Nafidi, Thami El Gouti, Ali Khalal, Driss Barkissy, Abderrazak Boutramine, Nassima Benchtaber
Publikováno v:
Applied Physics A. 123
We report here the theoretical calculations of band structures E(d 1), E(k z , k p ) and effective mass along the growth axis and in the plane of GaAs/Al x Ga1−x As superlattices, in the envelope function formalism. The effect of valence band offse
Autor:
Ali Khalal, Driss Khatib
Publikováno v:
physica status solidi c. 3:3337-3340
A lattice dynamical formalism using the shell model (R. A. Cowley, Phys. Rev. 134, A981 (1964) [1]) is applied to ferroelectric crystal BaTiO3, in the tetragonal phase. This microscopic model includes the short-range interactions of axially symmetric
Publikováno v:
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy. 327:1077-1082
Resume La dynamique du reseau du titanate de plomb PbTiO 3 est etudiee en phase quadratique a l'aide d'un modele a coquille tenant compte des polarisabilites electroniques des ions de la maille elementaire et des interactions a longue et a courte por
Publikováno v:
2011 International Conference on Multimedia Computing and Systems.
The electrical and optical properties of lead titanate (PbTiO 3 ) at room temperature are theoretically investigated by using a microscopic model based on the orbital approximation in correlation with the dipole-dipole interaction. We find that both
Publikováno v:
2009 International Conference on Multimedia Computing and Systems.
The surface and interface effects on the dielectric polarization and refractive indices of BaTiO 3 single crystals and BaTiO 3 ultrathin films on SrTiO 3 single crystal substrates are investigated theoretically by using a microscopic model based on t