Comment on "Quantum Confinement and Optical Gaps in Si Nanocrystals"

Details Comment on "Quantum Confinement and Optical Gaps in Si Nanocrystals" Comment on "Quantum Confinement and Optical Gaps in Si Nanocrystals"

1998-04-20

arxiv.org/abs/cond-mat/9804216v1

Physics

Condensed Matter

Materials Science

3 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.83.1269

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.

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