The effect of the electric field on the nucleation of the nanometer periodic structure of adatoms in GaAs semiconductor under the action of laser irradiation

Peleshchak, Roman; Kuzyk, O. V.; Dan’kiv, O. O.; Guba, S. K.

doi:10.5488/cmp.22.13801

Cited by 6 publications

(1 citation statement)

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“…It should also be noted that QDs are sensitive to deformation [9], in particular, to the influence of acoustic waves. Acoustic deformation can occur, for example, under the influence of ultrasound [10] or photoacoustic effect (light radiation can lead to the generation of sound by a nanocluster) [11,12]. Such acoustic deformation due to the deformation potential can significantly change the energy spectrum of QDs [13].…”

Section: Introductionmentioning

confidence: 99%

The Spectrum of Natural Frequencies of Acoustic Oscillations of a Spherical Quantum Dot with a Multilayer Shell

Peleshchak¹,

Kuzyk²,

Dan’kiv³

2021

J. Nano- Electron. Phys.

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A model that allows to determine the spectrum of acoustic oscillations of a spherical quantum dot (QD) of the core/multilayer shell type within the elastic continuum has been developed. The proposed model takes into account the dependence of elastic constants (acoustic wave velocities) on the geometric dimensions of the core of a QD and individual layers of its shell. Within the framework of the developed model, the spectrum of acoustic oscillations for QDs of the type of the InAs core with a single-layer GaAs shell and a double-layer GaAs/In0.4Ga0.6As shell is calculated. It is established that the presence of a shell in a QD leads to a significant decrease in the natural frequencies of acoustic oscillations. It is shown that an increase in the number of shell nanolayers leads to a decrease in the degree of correlation between the frequencies of acoustic oscillations and the radius of the QD core. This is explained by the fact that frequencies of oscillations are mainly determined by two competing factors: the dependence of the frequency of oscillations on the QD radius and the dependence of the propagation velocities of longitudinal and transverse oscillations in thin layers on their thicknesses. The first factor contributes to a decrease in the frequency with increasing QD radius, and the second factor contributes to a decrease in the frequency with a decrease in the number of atoms in nanolayers (a decrease in their thickness).

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