Abstract
The correlated ground-state wave function and energy of diamond are calculated. The calculations are done in order to demonstrate that electron correlations in solids can be treated with the same accuracy as in small systems. This is achieved by applying a recently developed Local Approach to the correlation problem. The approach requires a SCF calculation as a starting point. We present such a calculation for diamond by applying a method due to Stoll and Preuss which uses localization potentials. The correlation energy is analysed in terms of inter- and intraatomic correlation energy contributions. The results are used to calculate the binding energy of diamond.
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