Abstract
The bond charge model (BCM), originally designed by Weber for the dynamics of tetrahedrally coordinated semiconductors, is shown to be applicable, with minor adjustments, to ${\mathit{sp}}^{2}$ configurations. Calculations for the bulk and surface dynamics of graphite, based on a comparatively small number of adjustable parameters (five or six), are shown to be in excellent agreement with recent inelastic helium atom scattering data and high-resolution electron-energy-loss spectroscopy. The parameter transferability to other forms of ${\mathit{sp}}^{2}$-bonded carbons is discussed with the indication that BCM is easily applicable to large structures (e.g., giant fullerenes) presently inaccessible to ab initio methods, with a comparatively modest computational effort.
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