Hydrostatic pressure, temperature, and electric field effects on the hydrogenic impurity binding energy in a multilayered spherical quantum dot

Fakkahi, A.; Sali, A.; Jaouane, M.; Arraoui, R.

doi:10.1007/s00339-021-05055-x

Cited by 33 publications

(9 citation statements)

References 32 publications

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“…These studies show that the binding energy of the donor and bound electron-hole increases almost linearly with pressure and geometric quantum effects. With or without donor atoms, the effect of temperature on the charge carrier states trapped in the SQD nanostructure has been recognized by several authors [5][6][7][22][23][24][25][26][27][28][29][30]. The confinement and interaction of the donor atom with the electron and hole in QDs has been studied by Stébé et al [31].…”

Section: Introductionmentioning

confidence: 99%

Impact of Applied Temperature and Hydrostatic Pressure on the Off-Center Donor Spectrum in Spherical Quantum Dot

Chouef

Mommadi

Boussetta

et al. 2022

SSP

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Within the effective mass approximation and the infinite confinement potential, this work focused on studying the electronic properties of spherical quantum dot (SQD) nanostructure through the finite difference method. The effects of shallow donor impurity position, temperature (T), and hydrostatic pressure (P) on the binding energy, the electron spatial extension <re> and the average electron-impurity distance <rD-e> in a SQD have been evaluated. Our findings show that the binding energy increases as a function of hydrostatic pressure and decreases with the temperature effect. However, the binding energy presents very clear maximum around the spherical nanostructure center depending on the impurity position. For higher SQD, the impact of externals perturbations (P and T) on the electron spatial extension are more significant. The distance <re> decreases with the augmentation of hydrostatic pressure when the impurity is near the center, which is conversely when the impurity is near the edge. In addition, applying the hydrostatic pressure and temperature leads to decreasing and increasing the average distance <rD-e>, respectively.

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Section: Introductionmentioning

confidence: 99%

Impact of Applied Temperature and Hydrostatic Pressure on the Off-Center Donor Spectrum in Spherical Quantum Dot

Chouef

Mommadi

Boussetta

et al. 2022

SSP

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show abstract

“…It should be noted that the energy levels of a quantum dot can be affected by changes in such external factors as temperature, magnetic field, impurity, pressure, etc. And this in turn affects the optical properties of the quantum dot [14]- [19], [7], [20]. The main parameter in establishing the optical properties of a substance is the absorption coefficient.…”

Section: Introductionmentioning

confidence: 99%

Interband Optical Absorption Coefficient of the DMS Ellipsoid Quantum Dot with Rashba Spin Orbit Interaction.

Babanlı,

Balcı,

Ovezov

et al. 2024

Preprint

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In this paper, the effects of temperature, magnetic field, Rashba parameter, Mn atom impurity concentration and ellipsoid radius on the optical absorption coefficient of a dilute magnetic semiconductor ellipsoid quantum dot with spin-orbit Rashba interaction are investigated. Within the framework of the approximation of effective masses, the eigenvalue and the wave vector of the system are calculated. The obtained values are used to find the expression of the optical absorption coefficient for interband optical transitions. According to the results, temperature, magnetic field, Rashba parameter, Mn atom impurity concentration and ellipsoid radius change significantly affects the optical absorption coefficient.

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“…The quantum confinement that occurs the low dimensional system, quantum well [1,2], quantum wire [3] and QDs [4] exhibited new properties, especially the QD that has natural atomic-like discrete energy levels . Their physical properties can be controlled and adjusted by changing their size and composition, in addition to a variety of shapes which can be approximated as spherical [5,6], ring [7], cubic [8,9], cylindrical [10,11], pyramid [12] and ellipsoidal [13]. The QDs have drawn the attention by many researchers in both experimental and theoretical fields [14].…”

Section: Introductionmentioning

confidence: 99%

The nonlinear optical properties of self-assembled InAs/GaAs quantum dot under effect of temperature and hydrostatic pressure

Jaouane

El-Bakkari

et al. 2023

Preprint

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In this study, we have scrutinized the influences of the temperature \(\left(T\right)\) and hydrostatic pressure \(\left(P\right)\) on the nonlinear and linear optical properties of a core/shell quantum dot (QD) system with Screened Modified Kratzer potential (SMKP). To realize this goal, we have examined the energy levels and their associated wave functions using the diagonalization method within the effective mass approximation. Analytical terms for absorption coefficients (ACs) and relative refractive index changes (RRICs) are exploited by means of the density matrix approach. The numerical outcomes are offered for typical InAs/GaAs core/shell QD system. The dependency of SMKP, dipole transition matrix element and electron energies of the ground (\(1s\)) and first excited state (\(1p\)) on the \(P\) and \(T\) that are varied over a range. Obtained numerical calculation results revealed that the \(P\) and \(T\) impacts the magnitude and position of the resonant peaks that characterize the ACs and RRICs.

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Hydrostatic pressure, temperature, and electric field effects on the hydrogenic impurity binding energy in a multilayered spherical quantum dot

Cited by 33 publications

References 32 publications

Impact of Applied Temperature and Hydrostatic Pressure on the Off-Center Donor Spectrum in Spherical Quantum Dot

Impact of Applied Temperature and Hydrostatic Pressure on the Off-Center Donor Spectrum in Spherical Quantum Dot

Interband Optical Absorption Coefficient of the DMS Ellipsoid Quantum Dot with Rashba Spin Orbit Interaction.

The nonlinear optical properties of self-assembled InAs/GaAs quantum dot under effect of temperature and hydrostatic pressure

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