Comment on "Quantum Confinement and Optical Gaps in Si Nanocrystals"
arXiv:cond-mat/9804216 · doi:10.1103/PhysRevLett.83.1269
Abstract
We show that the method used by Ogut, Chelikowsky and Louie (Phys. Rev. Lett. 79, 1770 (1997)) to calculate the optical gap of Si nanocrystals omits an electron-hole polarization energy. When this contribution is taken into account, the corrected optical gap is in excellent agreement with semi-empirical pseudopotential calculations.
3 pages, 1 figure