It is found that the exciton binding energy as a function of the core radius of the quantum dot shows a strong non-linear behavior. The properties of excitons formed in spherical quantum dots are studied using the k⋅p method within the Hartree approximation. 326-338, Physica E: Low-dimensional Systems and Nanostructures, Volume 88, 2017, pp. [22], the binding energy of electron with off-center donor impurity in ellipsoidal QD is studied using the expansion method in the framework of parabolic potential model.During the last years, this method is often used in order to research the effect of external fields on the energy spectra of quasi-particles in spherical nanostructures [24–30].It allows obtaining the complete energy spectrum of quasi-particles, while the expansion coefficients determine the partial contribution of the states of the non-perturbed system in obtained solutions. The effect of magnetic field on electron energy spectrum, wave functions and probabilities of intraband quantum transitions in multilayered spherical quantum-dot-quantum-well (QDQW) CdSe/ZnS/CdSe/ZnS is studied. In order to obtain the electron energy spectrum and wave functions for the QDQW driven by the external magnetic field, the Schrodinger equation with the, The computer calculations were performed for CdSe/ZnS/CdSe/ZnS QDQW with physical parameters: m0=0.13me, m1=0.28me, V=900meV. where μ is the mobility in the absence of magnetic field, and = , = eB/mc is the cyclotron frequency, is the relaxation time, m, c are the electron effective mass and light velocity, respectively. © 2016 Elsevier B.V. All rights reserved. The theoretical investigation of magnetic field effect on energy spectrum and localization of the electron and oscillator strengths of intraband quantum transitions in the nanostructure CdS/HgS/CdS/HgS/CdS is performed. © 2008-2010 http://www.science-mathematics.com . I ne.. How many water molecules are in a 0.341 g sample, Does fabric help slow the melting of an ice cube, How to simplify the expression? In a magnetic field, it acquires an additional energy just as a bar magnet does and consequently the original energy level is shifted. The total magnetization and susceptibility arising from dia- and paramagnetic effects in a Gaussian quantum dot are calculated and their dependence on temperature (T) and magnetic field (B) are studied. And how to factor. The, Absorption coefficient and refractive index changes of a lens-shaped quantum dot: Rashba and Dresselhaus spin–orbit interactions under external fields, Linear and nonlinear optical absorption coefficients of two-electron spherical quantum dot with parabolic potential, The intersubband optical properties of a two-electron quantum dot-quantum well heterostructure, Dia- and paramagnetism and total susceptibility of GaAs quantum dots with Gaussian confinement, The effect of the electronic intersubband transitions of quantum dots on the linear and nonlinear optical properties of dot-matrix system. It should be noted that the peak positions and amplitudes of absorption coefficients are strongly dependent on the parabolic potential. It is shown that this state is successively formed by the states with m ≤ 0 (Aharonov-Bohm effect) when the magnetic field induction increases. An accelerating electric charge will create a magnetic field associated with the moving electric charge. -Hello,Since electrons are negatively charged particles, they are attracted more towards positive fields and repelled from negative fields. The overall conclusion is that the application of magnetic fields at frequencies ranging from a few Hertz to microwaves at the absorption frequencies observed in electron and nuclear resonance spectroscopy for radicals can lead to changes in free radical concentrations and have the potential to lead to biologically significant changes. The electron energy spectrum and wave functions in multishell spherical quantum dot, consisting of core and two spherical shells – potential wells separated by thin potential barriers, are obtained in the framework of the effective mass approximation and single band model. Linear and nonlinear absorption coefficients of two-electron spherical quantum dot (QD) with parabolic potential are investigated in this paper. 1. The electron energy spectrum in inverted core-shell quantum dot driven by magnetic and electric fields is studied. In the strong spatial confinement case, energy level is relatively insensitive to the magnetic field, and electron spatial confinement prevails over magnetic confinement. 292-299, Physica E: Low-dimensional Systems and Nanostructures, Volume 44, Issue 9, 2012, pp. However, the effect of magnetic field on electron energy spectrum is not studied yet. [17], it is established that the small change of the core radius can produce dramatic changes (alterations) in the electron density and in the optical properties of QDQWs. Copyright © 2020 Elsevier B.V. or its licensors or contributors. The magnetic field changes more the radial distribution of probability of electron location in QDQW than the angular one. 1826-1831, Superlattices and Microstructures, Volume 76, 2014, pp. The calculations are performed for multishell quantum dot CdSe/ZnS/CdSe/ZnS/CdSe. In particular, for quantum dots with two potential wells, the binding energy presents a large steep change. In Ref. There are more references available in the full text version of this article. Impurity leads to considerable change in the energy distribution of QD and allows us to create controlled optical transitions.Therefore, recently, many authors have studied the electronic structure [1–6], the binding energy [7–10], the optical properties such as absorption coefficients and refractive index changes [11–20] and other properties [21–25] of QDs.External perturbations such as electrical and magnetic field can provide much valuable information about the confined system. The formation of the electron ground state under the influence of the electric and magnetic field is researched. [9] it is shown that the influence of magnetic field on electron energy spectrum is more essential for the case of spherical layer than for the quantum dot, as far as the spherical layer with the same size of potential well has larger radius of curvature. The induction vector of the magnetic field is directed along the Oz axis. While most numerical and analytical investigations deal with the pure Rashba interaction, this article will study the absorption coefficient and refractive index changes of a lens-shaped GaAs quantum dot in the presence of simultaneous Rashba and Dresselhaus spin–orbit couplings under the effects of applied electric and magnetic fields. In addition, we have investigated the magnetic field effect on optical transitions between Zeeman energy states. The dependences of electron energy spectrum and its wave functions on the location of impurity, placed along the direction of magnetic field or perpendicularly to it, are studied.