Electronic and optical properties of exciton, trions and biexciton in II–VI parabolic quantum dot

Sujanah, P.; Peter, A. John; Lee, Chang Woo

doi:10.1016/j.physe.2015.04.020

Cited by 10 publications

(2 citation statements)

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“…This diversity concerns both the geometric shape of the structure and the profile of the associated confinement potential. There have been several reports on excitonic phenomena in 0D nanostructures where they are described as rectangular quantum boxes (QB) with a finite or infinite confinement barrier [1][2][3], spherical quantum dots with a rectangular potential barrier [4,5], parabolic [6][7][8] and gradual potential profile [9]. We found also a description of 0D nanostructures as cylindrical [10][11][12][13][14][15][16], conical [17], triangular [18], and lens-shaped quantum dots [19].…”

Section: Introductionmentioning

confidence: 59%

Exciton in Semiconductor Quantum Box: An Important Analytical Computational Step

Haddad¹

2023

Acta Phys. Pol. A

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A theoretical model to determine the properties of an exciton confined in a semiconductor quantum box with rectangular potential is presented. We have used the two-band model and the effective mass approximation. The theoretical approach includes a considerable analytic phase and makes it possible to reduce the numerical calculations. According to the new formulation, the limit cases for an exciton in a bulk semiconductor and an exciton confined in a two-dimensional structure are deduced, and a good agreement is shown in comparison with known results in the literature. We calculated the binding energy, spatial extension, and effective Bohr radius of the exciton. The variation law of the confined exciton energy, as a function of the dimension of the semiconductor quantum box, is established. The illustrations are given for a rectangular confining potential with finite and infinite barriers.

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Section: Introductionmentioning

confidence: 59%

Exciton in Semiconductor Quantum Box: An Important Analytical Computational Step

Haddad¹

2023

Acta Phys. Pol. A

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“…Therefore, these nanostructures have attracted considerable attention both theoretically as well as experimentally. [1][2][3][4][5][6][7][8][9][10][11][12] In the presence of impurities electronic, magnetic, transport and optical properties of quantum devices can change dramatically. 13 The neutrally charged hydrogenic donor impurity Schrödinger equation has been solved exactly by different methods.…”

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confidence: 99%

Effect of Magnetic Field on the Energy Spectrum, Binding Energy and Magnetic Susceptibility of an Impurity in a 2D Gaussian Quantum Dot

Boda

2021

ECS J. Solid State Sci. Technol.

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The problem of on-center acceptor A 0 and donor D 0 impurities in a two-dimensional (2D) GaAs quantum dot in the presence of an externally applied magnetic field now modelled with Gaussian confinement and examined with the exact matrix diagonalization technic. Magnetic moment, susceptibilities are calculated after obtaining the energy spectrum of these impurities. I have compared the results of these impurities with parabolic confinement. I found an interesting phenomenon in the attendance of spin-Zeeman term, the ground state magnetic (GSM) moment M g s and the GSM susceptibility S g s of one electron system, donor D 0 and acceptor A 0 impurity systems demonstrate zero-temperature diamagnetic spikes owing to transitions in the orbital angular momentum (OAM). The number of spikes and the position of these spikes depend on the radius of the quantum dot and depth of the potential V 0 also. The low-lying binding energy levels have been studied by computing state away from the energies of donor D 0 impurity and an electron.

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Strongly confined 2D parabolic quantum dot: Biexciton or quadron?

Quang

Huong

Dung³

et al. 2021

Physica B: Condensed Matter

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Electronic and optical properties of exciton, trions and biexciton in II–VI parabolic quantum dot

Cited by 10 publications

References 25 publications

Exciton in Semiconductor Quantum Box: An Important Analytical Computational Step

Exciton in Semiconductor Quantum Box: An Important Analytical Computational Step

Effect of Magnetic Field on the Energy Spectrum, Binding Energy and Magnetic Susceptibility of an Impurity in a 2D Gaussian Quantum Dot

Strongly confined 2D parabolic quantum dot: Biexciton or quadron?

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