Angular forces and valence force field in C and Si
- 7 October 1975
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 8 (19), 3108-3114
- https://doi.org/10.1088/0022-3719/8/19/010
Abstract
A chemical pseudopotential approach based on bonding orbitals is used to evaluate the valence force field in carbon and silicon. While the approximations involved give a reasonable account of the elastic constants, phonon frequencies near the Brillouin zone boundary are less well described. Reasons for this failure are discussed.Keywords
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