Charged excitons and trions in 2D parabolic quantum dots

Quang, Nguyễn Hồng; Huong, Nguyen Que

doi:10.1016/j.physb.2022.413781

Cited by 2 publications

(2 citation statements)

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“…To confirm the method of our calculation, a comparison with experimental results was made. A good agreement between our results and the experimental data for the binding energy of the biexciton [8,9] and charged excitons [11] has been obtained. Here we note that for an InAs/GaAs self-assembled quantum dot, the electron-to-hole oscillator length ratio l e /l h = 1.3 corresponds to the value of our calculated biexciton binding energy −0.45 (2Ry * ) ≈ −5.1 meV, which is well consistent with the experimental data interval [−1 meV : −6 meV] in [16].…”

Section: Dependence On Magnetic Fieldsupporting

confidence: 84%

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Biexcitons and quadrons in self-assembled quantum dots

Hong Quang,

Thi Kim Thanh,

Que Huong

2024

Semicond. Sci. Technol.

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We theoretically study biexcitons and quadrons in quantum dots with parabolic confinement and give a complete comparison between the two excitations. The calculation of quadron and biexciton binding energies as functions of electron-to-hole confinement potentials and mass ratios, using unrestricted Hartree-Fock method, shows the essential differences between biexciton and quadron. The crossover between the negative and positive binding energies is indicated. Besides, the effect of external magnetic field on the quadron and biexciton binding energies has also been investigated. In addition, the crossing between anti-binding and binding of both excited quadron and biexciton states at a certain range of the electron-to-hole oscillator length ratios has been found.

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Section: Dependence On Magnetic Fieldsupporting

confidence: 84%

“…A self-assembled semiconductor quantum dot [7] with parabolic confinement potential plays an important role in the study of excitons and their complexities [8][9][10][11][12][13][14][15][16][17][18][19][20]. Self-assembled quantum dots are mainly formed through strain-induced mechanisms.…”

Section: Introductionmentioning

confidence: 99%