Effect of polarization on exciton 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 is studied by the method of direct numerical solution of the Schrödinger equation. Polarization and screening effects 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.
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Keywords
Wannier-Mott exciton, semiconductor quantum dot, polarization, screening, confinementAuthors
| Name | Organization | |
| Rekhviashvili S.Sh. | Institute of Applied Mathematics and Automation of KBSC RAS | rsergo@mail.ru |
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