Phys. Rev. B 28, 7346–7348 (1983)Convergence of momentum space, pseudopotential calculations for SiReceived 27 July 1983; published in the issue dated 15 December 1983 Using ab initio pseudopotentials for Si and the momentum-space formalism the convergence of the total energy with respect to all major cutoff parameters has been investigated. The calculations have been carried far enough that uncertainties due to cutoff can be estimated to be small. Using Ceperley and Alder's correlation energy, the calculated total energy and equilibrium lattice constant are smaller by 0.023 Ry/atom and 0.07 Å, respectively, compared with experiment, whereas the use of the Wigner formula reduces these deviations by about a factor of 2. © 1983 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.28.7346
DOI:
10.1103/PhysRevB.28.7346
PACS:
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