Coulomb, exchange, kinetic, nuclear attraction and ionization energies of two-electron quantum dot with finite confinement potential

Yakar, Yusuf; Çakır, Bekir; Demir, Celalettin; Özmen, Ayhan

doi:10.1016/j.physleta.2023.128724

Cited by 15 publications

(3 citation statements)

References 40 publications

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“…A manifestation of that would be an increase of the maximum of the electronic density. The effects of the confinement on the wavefunction as well as the electronic density have been already tackled by some authors as can be seen in References [18,31,35,36]. The decrease of the polarizability is more marked for the H − -dot than Table 1.…”

Section: Energy Levels Electric Dipole Polarizability Oscillator Stre...mentioning

confidence: 99%

Shape and quantum size effects on the electronic structure, oscillator strengths and state lifetimes of helium-like quantum dots

Doba,

Melingui Melono,

Motapon

2023

Phys. Scr.

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Transition energies, electric static polarizability, oscillator strengths and state lifetimes of helium-like quantum dots are determined as a function of their shape and size. A configuration interaction approach based on B-spline functions is used. We found that, the oscillator strengths present an extremum around a low value of the dot radius whatever the shape of the confining potential. This extremum is due to the pressure on the energy levels in such a way that for a particular value of the dot radius, the second electron in the excited one-electron state reaches the borders of the confinement potential. The extremum position depends on the impurity charge and the oscillator strength value at this point changes with the potential well shape. As well, the increase of the effective mass involves the shift of the position of the oscillator strength extremum towards weak radius values. The first excited state lifetime globally increases with the dot radius and the reduction of the nuclear charge but presents a shoulder for a certain low value of the dot radius mostly marked for a triangular form of the confining potential.

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Section: Energy Levels Electric Dipole Polarizability Oscillator Stre...mentioning

confidence: 99%

Shape and quantum size effects on the electronic structure, oscillator strengths and state lifetimes of helium-like quantum dots

Doba,

Melingui Melono,

Motapon

2023

Phys. Scr.

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“…Using a quasi-exactly-solvable method, Goudarzi et al studied the magnetic field effects on the non-relativistic particles of a two dimensional two-electron QD under the presence of harmonic plus linear terms as well as a term related to spin interaction [34]. Considering two electrons confined into a spherical cavity of finite barrier height, the Coulomb, exchange, and configuration-average ionization energies for the ground and excited configurations in helium atom have been studied by Yakar et al [35]. They have carried out kinetic energies, nuclear attraction energies, confining potential energies, and probabilities of finding the electrons that occupy different subshells, and finding that in the strong and intermediate confinement regions, the barrier height of potential well and dot size have a strong influence on the energies and probabilities.…”

Section: Introductionmentioning

confidence: 99%

Infrared relative dielectric permittivity and refractive index on the spherical CdSe/ZnS heteronanocrystals with self-consistent field

Ortakaya,

Duque

2024

Phys. Scr.

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We deal with allowed-subband quantum states of two-electron in a semiconductor spherical core/shell quantum dot. Within framework of the infrared transitions, solving the Schrödinger-Poisson equation for many body interactions on the conduction-subbands, we obtain energy shifts in the absorption peaks of dielectric function and refractive index. The energy eigenvalues of the CdSe/ZnS nanocrystal have been computed as a function of the layer thicknesses via self-consistent field. The transitions related to $D^{-}$ and $D^0$ states, have been plotted considering linear dielectric permittivity. Refractive index and absorption coefficient under 3.0 nm radius have been also presented as a function of infrared photon energies.

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“…Obviously, a hefty amount of research works is inclined to understanding various features of LDSN, including QDs. [ 1–30 ]…”

Section: Introductionmentioning

confidence: 99%

Harnessing the Shannon Entropy‐Based Magnetocaloric Effect in GaAs Quantum Dot under the Influence of Noise‐Anharmonicity Interplay

Bhakti,

Datta,

Ghosh

2024

Physica Status Solidi (b)

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In the present investigation, the Shannon entropy‐based magnetocaloric effect (MCE) of GaAs quantum dot (QD) is explored under the simultaneous influence of anharmonicity and Gaussian white noise (GWHN). The symmetry of the anharmonic potential (AHP), the manner of incorporation of GWHN, and the QD confinement interplay with great intricacy to tailor the MCE. AHP of odd (even) symmetry reduces (increases) the confinement of the system relative to the anharmonicity‐free system. Generally, the MCE profiles behave in diverse manner under additive white noise and multiplicative white noise and often show deviation from the noise‐free condition. It is also found that additive (multiplicative) noise lowers (raises) the magnitude of MCE in comparison with the noise‐free values.

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Coulomb, exchange, kinetic, nuclear attraction and ionization energies of two-electron quantum dot with finite confinement potential

Cited by 15 publications

References 40 publications

Shape and quantum size effects on the electronic structure, oscillator strengths and state lifetimes of helium-like quantum dots

Shape and quantum size effects on the electronic structure, oscillator strengths and state lifetimes of helium-like quantum dots

Infrared relative dielectric permittivity and refractive index on the spherical CdSe/ZnS heteronanocrystals with self-consistent field

Harnessing the Shannon Entropy‐Based Magnetocaloric Effect in GaAs Quantum Dot under the Influence of Noise‐Anharmonicity Interplay

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