Effect of Polarization on Exciton Properties in a Semiconductor Quantum Dot

The Wannier–Mott exciton in a semiconductor quantum dot is considered. The effect of medium polarization and the effect of screening of the “electron-hole” Coulomb interaction on the exciton properties are studied by the method of direct numerical solution of the Schrödinger equation. Polarization a...

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Bibliographic Details
Published inRussian physics journal Vol. 65; no. 12; pp. 2058 - 2067
Main Author Rekhviashvili, S. Sh
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 01.04.2023
Springer
Springer Nature B.V
Subjects
Condensed Matter Physics
Electrons
Excitons
Force and energy
Hadrons
Heavy Ions
Holes (electron deficiencies)
Kinetic energy
Lasers
Mathematical and Computational Physics
Nuclear Physics
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Physics of Semiconductors and Dielectrics
Polarization
Quantum dots
Schrodinger equation
Screening
Semiconductors
Theoretical
screening
polarization
semiconductor quantum dot
confinement
Wannier–Mott exciton
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Summary:The Wannier–Mott exciton in a semiconductor quantum dot is considered. The effect of medium polarization and the effect of screening of the “electron-hole” Coulomb interaction on the exciton properties are studied by the method of direct numerical solution of the Schrödinger equation. Polarization and screening have the greatest effect on exciton levels, if the quantum dot radius is commensurate with the exciton Bohr radius and the electron and hole polaron radii (strong confinement mode). As the quantum dot radius decreases, the sign of the intraexciton contribution to the energy changes, which is explained by an increase in the kinetic energy of the electron and hole and the loss of their bound state.
ISSN:1064-8887
1573-9228
DOI:10.1007/s11182-023-02871-x