The dielectric function of diamond in a covalent bonding model
- 5 February 1976
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 9 (3), L79-L82
- https://doi.org/10.1088/0022-3719/9/3/006
Abstract
The static longitudinal dielectric function of diamond has been calculated using the formula derived from linear response theory in the Hartree approximation. The energies and wavefunctions used in this expression are obtained by diagonalizing the model Hamiltonian introduced by Weaire and Thorpe (1971). The two parameters in this model are fitted to the experimental values of the indirect band gap and the valence bandwidth. Results are given for the wavevector dependence in the Delta , Sigma and Lambda directions. Effects due to local variations of the microscopic electric field shift the value of the macroscopic dielectric constant at q=O down by 14%, which brings it in good agreement with experiment.Keywords
This publication has 18 references indexed in Scilit:
- Random-phase-approximation dielectric function for diamond, with local field effects includedPhysical Review B, 1975
- Local-Field Effects in the Optical Spectrum of SiliconPhysical Review Letters, 1975
- Correlated Hartree-Fock energy bands for diamondPhysical Review B, 1975
- Dielectric Response in the Wannier Representation: Application to the Optical Spectrum of DiamondPhysical Review Letters, 1974
- Local field effects and the dielectric response matrix of insulators: A modelPhysical Review B, 1974
- Calculation of the dielectric function for a semiconductor modelJournal of Physics C: Solid State Physics, 1974
- Dielectric Function of a Model SemiconductorPhysica Status Solidi (b), 1972
- Quantum Theory of the Dielectric Constant in Real SolidsPhysical Review B, 1962
- Self-Consistent Field Approach to the Many-Electron ProblemPhysical Review B, 1959
- XXVIII. The electronic structure of diamondJournal of Computers in Education, 1952