Addition spectra of quantum dots: The role of dielectric mismatch

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Using atomistic pseudopotential wave functions we calculate the electron and hole charging energies of InAs quantum dots. We find that the charging energies depend strongly on the dielectric constant epsilon_out of the surrounding material, and that when the latter is smaller than the dielectric constant of the dot the electron-electron and hole-hole interactions are dominated by surface-polarization effects. We predict the addition energies and the quasi-particle gap as a function of size and epsilon_out. We find excellent agreement with recent single-dot tunneling spectroscopy data for epsilon_out=6.
11 pages, 3 figures

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Materials Science

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http://salesiana.dossiersoluciones.com/handle/123456789/29644

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9908417
 http://arxiv.org/abs/cond-mat/9908417

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arXiv