Addition spectra of quantum dots: The role of dielectric mismatch
Abstract
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 electronelectron and holehole interactions are dominated by surfacepolarization effects. We predict the addition energies and the quasiparticle gap as a function of size and epsilon_out. We find excellent agreement with recent singledot tunneling spectroscopy data for epsilon_out=6.
 Publication:

arXiv eprints
 Pub Date:
 August 1999
 DOI:
 10.48550/arXiv.condmat/9908417
 arXiv:
 arXiv:condmat/9908417
 Bibcode:
 1999cond.mat..8417F
 Keywords:

 Materials Science
 EPrint:
 11 pages, 3 figures