Tuning the binding energy of on-center donor in CdSe/ZnTe core/shell quantum dot by spatial parameters and magnetic field strength

Binding energies, oscillator strengths of core/shell spherical quantum dots with or without on- or off-center donor impurities under an external magnetic field

“…In this work, we consider a system similar to that studied by Chafai et al [19], which consists of a CdSe spherical nanodot enclosed by a ZnTe spherical layer. All the system is embedded in a SiO 2 matrix.…”

“…The calculations were performed for CdSe/ZnTe core-shell spherical QDs. The physical parameters used in our computations according to Chafai et al [19] * is the effective cyclotron frequency, and the finite confinement potential is taken to be V 0 = 1.27 eV = 68.73 Ry * .…”

“…Over the years, the study of the electronic and optical properties of atomic, molecular or nanoscale systems, especially under the influence of external perturbations has become very relevant for the researchers. Effects of external environments such as a magnetic field [11][12][13][14][15][16][17][18][19][20][21][22], an electric field [23][24][25][26], both electric and magnetic fields [27,28] and hydrostatic pressure [29] on the electronic and optical properties of the nanostructure systems with impurities located on or out from the center constitute a subject of considerable interest of theoretical and experimental studies. Recently, many investigations both theoretical and experimental have been carried out on the energy levels and binding energies of hydrogenic impurities in the presence of a magnetic field using diverse calculation methods such as perturbation, variational and finite-difference methods [30][31][32].…”

“…Such kinds of systems with various material types such as inverted and non inverted CdSe/ZnS [37], type-I PbSe/CdSe CSQD [38] and recently, inverted and non inverted CdSe/ZnTe [39], have been subject of numerous studies taking into consideration various types of external constraints. Chafai et al [19] have focused their attention on the effects of the magnetic field on energy levels and ground state binding energies of a CdSe/ZnTe CSQD with an on-center hydrogenic impurity; they found a noticeable modification of those properties as a result of the external magnetic field action notably the increase of the electron energy.…”

Impact of pressure on the resonant energy and resonant frequency for two barriers Ga1−xAlxAs/GaAs nanostructures

“…The study of hydrogenic impurity is one of the most pressing issues in semiconductor low-dimensional systems because the existence of an impurity in nanostructures has a significant impact on the electrical mobility and optical properties of those structures [5][6][7][8]. The ability to adjust semiconductor optical and electronic properties by injecting impurities is one of the most important reasons because they have potential applications in electronic and optoelectronic devices [9]. The impacts of external perturbations like pressure, temperature, electric, magnetic, and intense laser fields on the electronic and optical properties of single, double, or multiple quantum wells with numerous confinement potential types are crucial aspects in condensed matter physics, and these effects have been extensively studied in various situations [10][11][12][13][14][15][16][17].…”