Abstract
Quantum mechanical pseudopotential calculations of the absorption spectra and static dielectric constant of Si quantum dots with ∼100-1300 atoms are presented. The predicted is found to be significantly reduced relative to the bulk value, but is considerably larger than the value deduced from currently available model calculations. A convenient parametrization of vs size is provided. We find that for quantum dots with Å the electron-hole pair is confined by the physical dimension of the dot, not by the Coulomb attraction.
- Received 24 January 1994
DOI:https://doi.org/10.1103/PhysRevLett.73.1039
©1994 American Physical Society